diff --git a/doc/bash_completion/aria2c b/doc/bash_completion/aria2c
index fba97156..4463d97b 100644
--- a/doc/bash_completion/aria2c
+++ b/doc/bash_completion/aria2c
@@ -78,7 +78,7 @@ _aria2c()
     esac
     case $cur in
         -*)
-            COMPREPLY=( $( compgen -W '--rpc-save-upload-metadata --rpc-save-upload-metadata=false --on-download-start --metalink-language --rpc-secret --torrent-file --enable-peer-exchange --enable-peer-exchange=false --http-proxy-passwd --bt-tracker-timeout --ftp-type --seed-time --keep-unfinished-download-result --keep-unfinished-download-result=false --bt-tracker-connect-timeout --bt-max-open-files --no-netrc --no-netrc=false --force-sequential --force-sequential=false --metalink-base-uri --private-key --ftp-passwd --allow-overwrite --allow-overwrite=false --rpc-allow-origin-all --rpc-allow-origin-all=false --bt-detach-seed-only --bt-detach-seed-only=false --dht-entry-point6 --summary-interval --lowest-speed-limit --bt-tracker-interval --proxy-method --metalink-preferred-protocol --enable-http-keep-alive --enable-http-keep-alive=false --metalink-version --stderr --stderr=false --bt-lpd-interface --force-save --force-save=false --rpc-secure --rpc-secure=false --listen-port --rpc-private-key --server-stat-of --server-stat-timeout --bt-load-saved-metadata --bt-load-saved-metadata=false --https-proxy-user --piece-length --dry-run --dry-run=false --truncate-console-readout --truncate-console-readout=false --save-not-found --save-not-found=false --async-dns-server --bt-max-peers --max-overall-upload-limit --rpc-user --optimize-concurrent-downloads --optimize-concurrent-downloads=true --optimize-concurrent-downloads=false --optimize-concurrent-downloads=A:B --dir --split --on-download-pause --auto-file-renaming --auto-file-renaming=false --http-proxy --save-session-interval --daemon --daemon=false --https-proxy --min-tls-version --save-cookies --out --rlimit-nofile --max-file-not-found --on-download-stop --certificate --bt-min-crypto-level --remove-control-file --remove-control-file=false --enable-dht --enable-dht=false --file-allocation --follow-metalink --on-bt-download-complete --ftp-proxy --show-files --show-files=false --timeout --bt-hash-check-seed --bt-hash-check-seed=false --ftp-pasv --ftp-pasv=false --check-certificate --check-certificate=false --always-resume --always-resume=false --load-cookies --bt-remove-unselected-file --bt-remove-unselected-file=false --bt-stop-timeout --version --max-concurrent-downloads --quiet --quiet=false --max-download-result --content-disposition-default-utf8 --content-disposition-default-utf8=false --max-resume-failure-tries --header --rpc-listen-all --rpc-listen-all=false --all-proxy-user --server-stat-if --dht-file-path6 --save-session --bt-external-ip --max-tries --conditional-get --conditional-get=false --ftp-reuse-connection --ftp-reuse-connection=false --gid --dscp --max-download-limit --bt-prioritize-piece --check-integrity --check-integrity=false --log-level --remote-time --remote-time=false --uri-selector --rpc-listen-port --index-out --bt-tracker --referer --ssh-host-key-md --console-log-level --connect-timeout --stream-piece-selector --dht-message-timeout --select-file --download-result --disable-ipv6 --disable-ipv6=false --rpc-max-request-size --rpc-passwd --stop-with-process --https-proxy-passwd --continue --continue=false --no-file-allocation-limit --netrc-path --ftp-proxy-user --enable-color --enable-color=false --metalink-location --allow-piece-length-change --allow-piece-length-change=false --max-connection-per-server --no-conf --no-conf=false --rpc-certificate --metalink-os --enable-http-pipelining --enable-http-pipelining=false --http-passwd --user-agent --enable-dht6 --enable-dht6=false --dht-file-path --http-auth-challenge --http-auth-challenge=false --bt-enable-hook-after-hash-check --bt-enable-hook-after-hash-check=false --peer-id-prefix --max-mmap-limit --enable-mmap --enable-mmap=false --use-head --use-head=false --bt-require-crypto --bt-require-crypto=false --show-console-readout --show-console-readout=false --conf-path --log --no-proxy --dht-entry-point --dht-listen-port --http-user --retry-wait --on-download-complete --help --help=#basic --help=#advanced --help=#http --help=#https --help=#ftp --help=#metalink --help=#bittorrent --help=#cookie --help=#hook --help=#file --help=#rpc --help=#checksum --help=#experimental --help=#deprecated --help=#help --help=#all --max-overall-download-limit --event-poll --http-accept-gzip --http-accept-gzip=false --metalink-file --all-proxy --disk-cache --hash-check-only --hash-check-only=false --dht-listen-addr6 --human-readable --human-readable=false --ftp-user --all-proxy-passwd --bt-exclude-tracker --pause-metadata --pause-metadata=false --http-proxy-user --deferred-input --deferred-input=false --metalink-enable-unique-protocol --metalink-enable-unique-protocol=false --stop --peer-agent --max-upload-limit --multiple-interface --realtime-chunk-checksum --realtime-chunk-checksum=false --http-no-cache --http-no-cache=false --ca-certificate --bt-force-encryption --bt-force-encryption=false --bt-save-metadata --bt-save-metadata=false --seed-ratio --follow-torrent --pause --pause=false --checksum --auto-save-interval --async-dns --async-dns=false --bt-enable-lpd --bt-enable-lpd=false --parameterized-uri --parameterized-uri=false --ftp-proxy-passwd --enable-rpc --enable-rpc=false --min-split-size --bt-seed-unverified --bt-seed-unverified=false --input-file --interface --enable-async-dns6 --enable-async-dns6=false --reuse-uri --reuse-uri=false --socket-recv-buffer-size --bt-request-peer-speed-limit --on-download-error --bt-metadata-only --bt-metadata-only=false ' -- "$cur" ) )
+            COMPREPLY=( $( compgen -W '--rpc-save-upload-metadata --rpc-save-upload-metadata=false --on-download-start --metalink-language --rpc-secret --torrent-file --enable-peer-exchange --enable-peer-exchange=false --http-proxy-passwd --bt-tracker-timeout --ftp-type --seed-time --keep-unfinished-download-result --keep-unfinished-download-result=false --bt-tracker-connect-timeout --bt-max-open-files --no-netrc --no-netrc=false --force-sequential --force-sequential=false --metalink-base-uri --private-key --ftp-passwd --allow-overwrite --allow-overwrite=false --rpc-allow-origin-all --rpc-allow-origin-all=false --bt-detach-seed-only --bt-detach-seed-only=false --dht-entry-point6 --summary-interval --lowest-speed-limit --bt-tracker-interval --proxy-method --metalink-preferred-protocol --enable-http-keep-alive --enable-http-keep-alive=false --metalink-version --stderr --stderr=false --bt-lpd-interface --force-save --force-save=false --rpc-secure --rpc-secure=false --listen-port --rpc-private-key --server-stat-of --server-stat-timeout --bt-load-saved-metadata --bt-load-saved-metadata=false --https-proxy-user --piece-length --dry-run --dry-run=false --truncate-console-readout --truncate-console-readout=false --save-not-found --save-not-found=false --async-dns-server --bt-max-peers --max-overall-upload-limit --rpc-user --optimize-concurrent-downloads --optimize-concurrent-downloads=true --optimize-concurrent-downloads=false --optimize-concurrent-downloads=A:B --dir --split --on-download-pause --auto-file-renaming --auto-file-renaming=false --http-proxy --save-session-interval --daemon --daemon=false --https-proxy --min-tls-version --save-cookies --out --rlimit-nofile --max-file-not-found --on-download-stop --certificate --bt-min-crypto-level --remove-control-file --remove-control-file=false --enable-dht --enable-dht=false --file-allocation --follow-metalink --on-bt-download-complete --ftp-proxy --show-files --show-files=false --timeout --bt-hash-check-seed --bt-hash-check-seed=false --ftp-pasv --ftp-pasv=false --check-certificate --check-certificate=false --always-resume --always-resume=false --load-cookies --bt-remove-unselected-file --bt-remove-unselected-file=false --bt-stop-timeout --version --max-concurrent-downloads --quiet --quiet=false --max-download-result --content-disposition-default-utf8 --content-disposition-default-utf8=false --max-resume-failure-tries --header --rpc-listen-all --rpc-listen-all=false --all-proxy-user --server-stat-if --dht-file-path6 --save-session --bt-external-ip --max-tries --conditional-get --conditional-get=false --ftp-reuse-connection --ftp-reuse-connection=false --gid --dscp --max-download-limit --bt-prioritize-piece --check-integrity --check-integrity=false --log-level --remote-time --remote-time=false --uri-selector --rpc-listen-port --index-out --bt-tracker --referer --ssh-host-key-md --console-log-level --connect-timeout --stream-piece-selector --dht-message-timeout --select-file --download-result --disable-ipv4 --disable-ipv4=false --disable-ipv6 --disable-ipv6=false --rpc-max-request-size --rpc-passwd --stop-with-process --https-proxy-passwd --continue --continue=false --no-file-allocation-limit --netrc-path --ftp-proxy-user --enable-color --enable-color=false --metalink-location --allow-piece-length-change --allow-piece-length-change=false --max-connection-per-server --no-conf --no-conf=false --rpc-certificate --metalink-os --enable-http-pipelining --enable-http-pipelining=false --http-passwd --user-agent --enable-dht6 --enable-dht6=false --dht-file-path --http-auth-challenge --http-auth-challenge=false --bt-enable-hook-after-hash-check --bt-enable-hook-after-hash-check=false --peer-id-prefix --max-mmap-limit --enable-mmap --enable-mmap=false --use-head --use-head=false --bt-require-crypto --bt-require-crypto=false --show-console-readout --show-console-readout=false --conf-path --log --no-proxy --dht-entry-point --dht-listen-port --http-user --retry-wait --on-download-complete --help --help=#basic --help=#advanced --help=#http --help=#https --help=#ftp --help=#metalink --help=#bittorrent --help=#cookie --help=#hook --help=#file --help=#rpc --help=#checksum --help=#experimental --help=#deprecated --help=#help --help=#all --max-overall-download-limit --event-poll --http-accept-gzip --http-accept-gzip=false --metalink-file --all-proxy --disk-cache --hash-check-only --hash-check-only=false --dht-listen-addr6 --human-readable --human-readable=false --ftp-user --all-proxy-passwd --bt-exclude-tracker --pause-metadata --pause-metadata=false --http-proxy-user --deferred-input --deferred-input=false --metalink-enable-unique-protocol --metalink-enable-unique-protocol=false --stop --peer-agent --max-upload-limit --multiple-interface --realtime-chunk-checksum --realtime-chunk-checksum=false --http-no-cache --http-no-cache=false --ca-certificate --bt-force-encryption --bt-force-encryption=false --bt-save-metadata --bt-save-metadata=false --seed-ratio --follow-torrent --pause --pause=false --checksum --auto-save-interval --async-dns --async-dns=false --bt-enable-lpd --bt-enable-lpd=false --parameterized-uri --parameterized-uri=false --ftp-proxy-passwd --enable-rpc --enable-rpc=false --min-split-size --bt-seed-unverified --bt-seed-unverified=false --input-file --interface --enable-async-dns6 --enable-async-dns6=false --reuse-uri --reuse-uri=false --socket-recv-buffer-size --bt-request-peer-speed-limit --on-download-error --bt-metadata-only --bt-metadata-only=false ' -- "$cur" ) )
             ;;
         *)
             _filedir '@(torrent|meta4|metalink|text|txt|list|lst)'
diff --git a/doc/manual-src/en/aria2c.rst b/doc/manual-src/en/aria2c.rst
index 6722e0d2..9a5091cc 100644
--- a/doc/manual-src/en/aria2c.rst
+++ b/doc/manual-src/en/aria2c.rst
@@ -1274,6 +1274,10 @@ Advanced Options
     :option:`--deferred-input` option will be disabled when
     :option:`--save-session` is used together.
 
+.. option:: --disable-ipv4 [true|false]
+
+  Disable IPv4. Default: ``false``
+
 .. option:: --disable-ipv6 [true|false]
 
   Disable IPv6. This is useful if you have to use broken DNS and want
diff --git a/doc/manual-src/pt/aria2c.rst b/doc/manual-src/pt/aria2c.rst
index 668a3331..e06109a9 100644
--- a/doc/manual-src/pt/aria2c.rst
+++ b/doc/manual-src/pt/aria2c.rst
@@ -1145,6 +1145,10 @@ Opções Avançadas
   and options at startup.
   Padrão: ``false``
 
+.. option:: --disable-ipv4 [true|false]
+
+  Disable IPv4. Padrão: ``false``
+
 .. option:: --disable-ipv6 [true|false]
 
   Disable IPv6. This is useful if you have to use broken DNS and want
diff --git a/doc/manual-src/ru/aria2c.rst b/doc/manual-src/ru/aria2c.rst
index ebebe4f3..b36986d1 100644
--- a/doc/manual-src/ru/aria2c.rst
+++ b/doc/manual-src/ru/aria2c.rst
@@ -1348,6 +1348,11 @@ HTTP(S)/FTP, они тут же могут выгружаться в BitTorrent-
     параметр :option:`--deferred-input` будет заблокирован, если
     используется вместе с :option:`--save-session`.
 
+.. option:: --disable-ipv4 [true|false]
+
+  Отключить IPv4.
+  По умолчанию: ``false``
+
 .. option:: --disable-ipv6 [true|false]
 
   Отключить IPv6. Это полезно, если вы используете поврежденный DNS
diff --git a/src/AbstractCommand.cc b/src/AbstractCommand.cc
index bf307b75..109f457b 100644
--- a/src/AbstractCommand.cc
+++ b/src/AbstractCommand.cc
@@ -808,6 +808,9 @@ std::string AbstractCommand::resolveHostname(std::vector<std::string>& addrs,
   {
     NameResolver res;
     res.setSocktype(SOCK_STREAM);
+    if (e_->getOption()->getAsBool(PREF_DISABLE_IPV4)) {
+      res.setFamily(AF_INET6);
+    }
     if (e_->getOption()->getAsBool(PREF_DISABLE_IPV6)) {
       res.setFamily(AF_INET);
     }
diff --git a/src/AsyncNameResolverMan.cc b/src/AsyncNameResolverMan.cc
index be073561..aa07f59a 100644
--- a/src/AsyncNameResolverMan.cc
+++ b/src/AsyncNameResolverMan.cc
@@ -216,7 +216,7 @@ void configureAsyncNameResolverMan(AsyncNameResolverMan* asyncNameResolverMan,
   if (!net::getIPv4AddrConfigured() && !net::getIPv6AddrConfigured()) {
     net::checkAddrconfig();
   }
-  if (!net::getIPv4AddrConfigured()) {
+  if (!net::getIPv4AddrConfigured() || option->getAsBool(PREF_DISABLE_IPV4)) {
     asyncNameResolverMan->setIPv4(false);
   }
   if (!net::getIPv6AddrConfigured() || option->getAsBool(PREF_DISABLE_IPV6)) {
diff --git a/src/BtSetup.cc b/src/BtSetup.cc
index 6732e657..f039d1a3 100644
--- a/src/BtSetup.cc
+++ b/src/BtSetup.cc
@@ -183,9 +183,11 @@ void BtSetup::setup(std::vector<std::unique_ptr<Command>>& commands,
   }
   if (btReg->getTcpPort() == 0) {
     static int families[] = {AF_INET, AF_INET6};
-    size_t familiesLength =
+    size_t familiesStart =
+        e->getOption()->getAsBool(PREF_DISABLE_IPV4) ? 1 : 0;
+    size_t familiesEnd =
         e->getOption()->getAsBool(PREF_DISABLE_IPV6) ? 1 : 2;
-    for (size_t i = 0; i < familiesLength; ++i) {
+    for (size_t i = familiesStart; i < familiesEnd; ++i) {
       auto command =
           make_unique<PeerListenCommand>(e->newCUID(), e, families[i]);
       bool ret;
diff --git a/src/Context.cc b/src/Context.cc
index c6603261..7eba76bd 100644
--- a/src/Context.cc
+++ b/src/Context.cc
@@ -218,6 +218,9 @@ Context::Context(bool standalone, int argc, char** argv, const KeyVals& options)
   }
 #endif // defined(HAVE_SYS_RESOURCE_H) && defined(RLIMIT_NOFILE)
 
+  if (op->getAsBool(PREF_DISABLE_IPV4)) {
+    SocketCore::setProtocolFamily(AF_INET6);
+  }
   if (op->getAsBool(PREF_DISABLE_IPV6)) {
     SocketCore::setProtocolFamily(AF_INET);
   }
diff --git a/src/DownloadEngineFactory.cc b/src/DownloadEngineFactory.cc
index 3c5bfe58..32ba8e8c 100644
--- a/src/DownloadEngineFactory.cc
+++ b/src/DownloadEngineFactory.cc
@@ -206,8 +206,9 @@ std::unique_ptr<DownloadEngine> DownloadEngineFactory::newDownloadEngine(
       A2_LOG_NOTICE("RPC transport will be encrypted.");
     }
     static int families[] = {AF_INET, AF_INET6};
-    size_t familiesLength = op->getAsBool(PREF_DISABLE_IPV6) ? 1 : 2;
-    for (size_t i = 0; i < familiesLength; ++i) {
+    size_t familiesStart = op->getAsBool(PREF_DISABLE_IPV4) ? 1 : 0;
+    size_t familiesEnd = op->getAsBool(PREF_DISABLE_IPV6) ? 1 : 2;
+    for (size_t i = familiesStart; i < familiesEnd; ++i) {
       auto httpListenCommand = make_unique<HttpListenCommand>(
           e->newCUID(), e.get(), families[i], secure);
       if (httpListenCommand->bindPort(op->getAsInt(PREF_RPC_LISTEN_PORT))) {
diff --git a/src/InitiateConnectionCommand.cc b/src/InitiateConnectionCommand.cc
index b23413e8..c2b3258f 100644
--- a/src/InitiateConnectionCommand.cc
+++ b/src/InitiateConnectionCommand.cc
@@ -137,7 +137,8 @@ InitiateConnectionCommand::createBackupIPv4ConnectCommand(
   // fashion.
   std::shared_ptr<BackupConnectInfo> info;
   char buf[sizeof(in6_addr)];
-  if (inetPton(AF_INET6, ipaddr.c_str(), &buf) == -1) {
+  if (inetPton(AF_INET6, ipaddr.c_str(), &buf) == -1 ||
+      getOption()->getAsBool(PREF_DISABLE_IPV4)) {
     return info;
   }
   A2_LOG_INFO("Searching IPv4 address for backup connection attempt");
diff --git a/src/NameResolveCommand.cc b/src/NameResolveCommand.cc
index ec0ce044..563e4e6b 100644
--- a/src/NameResolveCommand.cc
+++ b/src/NameResolveCommand.cc
@@ -105,6 +105,9 @@ bool NameResolveCommand::execute()
     {
       NameResolver resolver;
       resolver.setSocktype(SOCK_DGRAM);
+      if (e_->getOption()->getAsBool(PREF_DISABLE_IPV4)) {
+        resolver.setFamily(AF_INET6);
+      }
       if (e_->getOption()->getAsBool(PREF_DISABLE_IPV6)) {
         resolver.setFamily(AF_INET);
       }
diff --git a/src/OptionHandlerFactory.cc b/src/OptionHandlerFactory.cc
index 4339c912..de315a59 100644
--- a/src/OptionHandlerFactory.cc
+++ b/src/OptionHandlerFactory.cc
@@ -211,6 +211,13 @@ std::vector<OptionHandler*> OptionHandlerFactory::createOptionHandlers()
     op->setChangeOptionForReserved(true);
     handlers.push_back(op);
   }
+  {
+    OptionHandler* op(new BooleanOptionHandler(PREF_DISABLE_IPV4,
+                                               TEXT_DISABLE_IPV4, A2_V_FALSE,
+                                               OptionHandler::OPT_ARG));
+    op->addTag(TAG_ADVANCED);
+    handlers.push_back(op);
+  }
   {
     OptionHandler* op(new BooleanOptionHandler(PREF_DISABLE_IPV6,
                                                TEXT_DISABLE_IPV6,
diff --git a/src/RequestGroup.cc b/src/RequestGroup.cc
index 379029ec..9dfc44cf 100644
--- a/src/RequestGroup.cc
+++ b/src/RequestGroup.cc
@@ -346,11 +346,13 @@ void RequestGroup::createInitialCommand(
             downloadContext_, pieceStorage_, peerStorage, btAnnounce, btRuntime,
             (progressInfoFile ? progressInfoFile : progressInfoFile_)));
 
-    if (option_->getAsBool(PREF_ENABLE_DHT) ||
+    if ((!e->getOption()->getAsBool(PREF_DISABLE_IPV4) &&
+        option_->getAsBool(PREF_ENABLE_DHT)) ||
         (!e->getOption()->getAsBool(PREF_DISABLE_IPV6) &&
          option_->getAsBool(PREF_ENABLE_DHT6))) {
 
-      if (option_->getAsBool(PREF_ENABLE_DHT)) {
+      if (!e->getOption()->getAsBool(PREF_DISABLE_IPV4) &&
+          option_->getAsBool(PREF_ENABLE_DHT)) {
         std::vector<std::unique_ptr<Command>> c, rc;
         std::tie(c, rc) = DHTSetup().setup(e, AF_INET);
 
diff --git a/src/prefs.cc b/src/prefs.cc
index 937e927d..c1c8adf9 100644
--- a/src/prefs.cc
+++ b/src/prefs.cc
@@ -302,6 +302,8 @@ PrefPtr PREF_INTERFACE = makePref("interface");
 // value: string
 PrefPtr PREF_MULTIPLE_INTERFACE = makePref("multiple-interface");
 // value: true | false
+PrefPtr PREF_DISABLE_IPV4 = makePref("disable-ipv4");
+// value: true | false
 PrefPtr PREF_DISABLE_IPV6 = makePref("disable-ipv6");
 // value: true | false
 PrefPtr PREF_HUMAN_READABLE = makePref("human-readable");
diff --git a/src/prefs.h b/src/prefs.h
index e1f83978..b1feb48d 100644
--- a/src/prefs.h
+++ b/src/prefs.h
@@ -255,6 +255,8 @@ extern PrefPtr PREF_INTERFACE;
 // value: string
 extern PrefPtr PREF_MULTIPLE_INTERFACE;
 // value: true | false
+extern PrefPtr PREF_DISABLE_IPV4;
+// value: true | false
 extern PrefPtr PREF_DISABLE_IPV6;
 // value: true | false
 extern PrefPtr PREF_HUMAN_READABLE;
diff --git a/src/usage_text.h b/src/usage_text.h
index d73b50d9..158de8f8 100644
--- a/src/usage_text.h
+++ b/src/usage_text.h
@@ -640,6 +640,8 @@
     "                              specify interface name, IP address and hostname.\n" \
     "                              If --interface is used, this option will be\n" \
     "                              ignored.")
+#define TEXT_DISABLE_IPV4                               \
+  _(" --disable-ipv4[=true|false]  Disable IPv4.")
 #define TEXT_DISABLE_IPV6                               \
   _(" --disable-ipv6[=true|false]  Disable IPv6.")
 #define TEXT_BT_SAVE_METADATA                                           \