diff --git a/gtk/transmission-gtk.desktop.in b/gtk/transmission-gtk.desktop.in
index d782433ba..c2d334639 100644
--- a/gtk/transmission-gtk.desktop.in
+++ b/gtk/transmission-gtk.desktop.in
@@ -3,10 +3,10 @@ _Name=Transmission
 _GenericName=BitTorrent Client
 _X-GNOME-FullName=Transmission BitTorrent Client
 _Comment=Download and share files over BitTorrent
-Exec=transmission-gtk %F
+Exec=transmission-gtk %U
 Icon=transmission
 Terminal=false
 TryExec=transmission-gtk
 Type=Application
-MimeType=application/x-bittorrent;
+MimeType=application/x-bittorrent;x-scheme-handler/magnet;
 Categories=Network;FileTransfer;P2P;GTK;