diff --git a/src/download_helper.cc b/src/download_helper.cc
index 93d19ee2..2879b8c3 100644
--- a/src/download_helper.cc
+++ b/src/download_helper.cc
@@ -70,6 +70,7 @@
 // TODO ENABLE CONTROLFILE
 #include "TorrentAttribute.h"
 #include "bittorrent_helper.h"
+#include "DefaultBtProgressInfoFile.h"
 
 namespace aria2 {
 
@@ -453,9 +454,10 @@ public:
     else if (!ignoreLocalPath_ && detector_.guessAria2ControlFile(uri))
     {
       // Extract hash and construct a magnet to feed into createBtMagentRequestGroup
+      const auto infoHash = DefaultBtProgressInfoFile::getInfoHash(uri);
 
-      auto torrent_attribute = std::make_unique<const TorrentAttribute>();
-      // torrent_attribute->infoHash = the hash from the file
+      auto torrent_attribute = std::make_unique<TorrentAttribute>();
+      torrent_attribute->infoHash = std::string(std::begin(infoHash), std::end(infoHash));
       const auto magent = aria2::bittorrent::torrent2Magnet(torrent_attribute.get());
       
       requestGroups_.push_back(createBtMagnetRequestGroup(magent, option_));