diff --git a/ChangeLog b/ChangeLog
index b0ce9b43..d3e3f404 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2010-10-02  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
+
+	Fixed compile error on OpenBSD4.7(i386). In openssl.m4, we first
+	search libcrypto and then libssl because libssl depends on
+	libcrypto on OpenBSD.
+	* src/Netrc.cc
+	* src/Netrc.h
+	* src/Triplet.h
+	* src/openssl.m4
+
 2010-10-02  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
 
 	Execute 5 DHT tasks concurrently in each task queue.
diff --git a/configure b/configure
index 1a905a7f..afed7853 100755
--- a/configure
+++ b/configure
@@ -6833,7 +6833,44 @@ if test "x$have_openssl" != "xyes"; then
   LIBS="-L$openssl_prefix_lib $LIBS"
   CPPFLAGS="-I$openssl_prefix_include $CPPFLAGS"
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SSL_library_init in -lssl" >&5
+  # First check libcrypto, because libssl may depend on it
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lcrypto" >&5
+$as_echo_n "checking for main in -lcrypto... " >&6; }
+if test "${ac_cv_lib_crypto_main+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lcrypto  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+int
+main ()
+{
+return main ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  ac_cv_lib_crypto_main=yes
+else
+  ac_cv_lib_crypto_main=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_crypto_main" >&5
+$as_echo "$ac_cv_lib_crypto_main" >&6; }
+if test "x$ac_cv_lib_crypto_main" = x""yes; then :
+  have_openssl=yes; LIBS="-lcrypto $LIBS"
+fi
+
+  if test "x$have_openssl" = "xyes"; then
+    have_openssl=no
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SSL_library_init in -lssl" >&5
 $as_echo_n "checking for SSL_library_init in -lssl... " >&6; }
 if test "${ac_cv_lib_ssl_SSL_library_init+set}" = set; then :
   $as_echo_n "(cached) " >&6
@@ -6873,42 +6910,6 @@ if test "x$ac_cv_lib_ssl_SSL_library_init" = x""yes; then :
   have_openssl=yes LIBS="-lssl $LIBS"
 fi
 
-  if test "x$have_openssl" = "xyes"; then
-    have_openssl=no
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lcrypto" >&5
-$as_echo_n "checking for main in -lcrypto... " >&6; }
-if test "${ac_cv_lib_crypto_main+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lcrypto  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-
-int
-main ()
-{
-return main ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
-  ac_cv_lib_crypto_main=yes
-else
-  ac_cv_lib_crypto_main=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_crypto_main" >&5
-$as_echo "$ac_cv_lib_crypto_main" >&6; }
-if test "x$ac_cv_lib_crypto_main" = x""yes; then :
-  have_openssl=yes; LIBS="-lcrypto $LIBS"
-fi
-
     if test "x$have_openssl" = "xyes"; then
       OPENSSL_LIBS="-L$openssl_prefix_lib -lssl -lcrypto"
       OPENSSL_CFLAGS="-I$openssl_prefix_include"
diff --git a/m4/openssl.m4 b/m4/openssl.m4
index 68a4bfb0..e3ed9261 100644
--- a/m4/openssl.m4
+++ b/m4/openssl.m4
@@ -36,10 +36,11 @@ if test "x$have_openssl" != "xyes"; then
   LIBS="-L$openssl_prefix_lib $LIBS"
   CPPFLAGS="-I$openssl_prefix_include $CPPFLAGS"
 
-  AC_CHECK_LIB([ssl], [SSL_library_init], [have_openssl=yes LIBS="-lssl $LIBS"])
+  # First check libcrypto, because libssl may depend on it
+  AC_CHECK_LIB([crypto], [main], [have_openssl=yes; LIBS="-lcrypto $LIBS"])
   if test "x$have_openssl" = "xyes"; then
     have_openssl=no
-    AC_CHECK_LIB([crypto], [main], [have_openssl=yes; LIBS="-lcrypto $LIBS"])
+    AC_CHECK_LIB([ssl], [SSL_library_init], [have_openssl=yes LIBS="-lssl $LIBS"])
     if test "x$have_openssl" = "xyes"; then
       OPENSSL_LIBS="-L$openssl_prefix_lib -lssl -lcrypto"
       OPENSSL_CFLAGS="-I$openssl_prefix_include"
diff --git a/src/Netrc.cc b/src/Netrc.cc
index 713b8b45..d4672a2b 100644
--- a/src/Netrc.cc
+++ b/src/Netrc.cc
@@ -44,17 +44,17 @@
 
 namespace aria2 {
 
-const std::string Netrc::MACHINE("machine");
+const std::string Netrc::A2_MACHINE("machine");
 
-const std::string Netrc::DEFAULT("default");
+const std::string Netrc::A2_DEFAULT("default");
 
-const std::string Netrc::LOGIN("login");
+const std::string Netrc::A2_LOGIN("login");
 
-const std::string Netrc::PASSWORD("password");
+const std::string Netrc::A2_PASSWORD("password");
 
-const std::string Netrc::ACCOUNT("account");
+const std::string Netrc::A2_ACCOUNT("account");
 
-const std::string Netrc::MACDEF("macdef");
+const std::string Netrc::A2_MACDEF("macdef");
 
 void Netrc::skipMacdef(std::ifstream& f) const
 {
@@ -97,11 +97,11 @@ void Netrc::parse(const std::string& path)
           eoi = tokens.end(); iter != eoi; ++iter) {
       const std::string& token = *iter;
       if(state == GET_TOKEN) {
-        if(token == Netrc::MACHINE) {
+        if(token == Netrc::A2_MACHINE) {
           storeAuthenticator(authenticator);
           authenticator.reset(new Authenticator());
           state = SET_MACHINE;
-        } else if(token == Netrc::DEFAULT) {
+        } else if(token == Netrc::A2_DEFAULT) {
           storeAuthenticator(authenticator);
           authenticator.reset(new DefaultAuthenticator());
         } else {
@@ -110,13 +110,13 @@ void Netrc::parse(const std::string& path)
               (StringFormat("Netrc:parse error. %s encounterd where 'machine'"
                             " or 'default' expected.", token.c_str()).str());
           }
-          if(token == Netrc::LOGIN) {
+          if(token == Netrc::A2_LOGIN) {
             state = SET_LOGIN;
-          } else if(token == Netrc::PASSWORD) {
+          } else if(token == Netrc::A2_PASSWORD) {
             state = SET_PASSWORD;
-          } else if(token == Netrc::ACCOUNT) {
+          } else if(token == Netrc::A2_ACCOUNT) {
             state = SET_ACCOUNT;
-          } else if(token == Netrc::MACDEF) {
+          } else if(token == Netrc::A2_MACDEF) {
             state = SET_MACDEF;
           }
         }
diff --git a/src/Netrc.h b/src/Netrc.h
index 6e399d13..8a0eb96a 100644
--- a/src/Netrc.h
+++ b/src/Netrc.h
@@ -160,17 +160,17 @@ public:
     authenticators_.push_back(authenticator);
   }
 
-  static const std::string MACHINE;
+  static const std::string A2_MACHINE;
 
-  static const std::string DEFAULT;
+  static const std::string A2_DEFAULT;
 
-  static const std::string LOGIN;
+  static const std::string A2_LOGIN;
 
-  static const std::string PASSWORD;
+  static const std::string A2_PASSWORD;
 
-  static const std::string ACCOUNT;
+  static const std::string A2_ACCOUNT;
 
-  static const std::string MACDEF;
+  static const std::string A2_MACDEF;
 };
 
 } // namespace aria2
diff --git a/src/Triplet.h b/src/Triplet.h
index 5632b1bb..f94b5ca3 100644
--- a/src/Triplet.h
+++ b/src/Triplet.h
@@ -35,6 +35,7 @@
 #ifndef D_TRIPLET_H
 #define D_TRIPLET_H
 
+#include <cstdlib>
 #include <utility>
 
 namespace aria2 {