diff --git a/pkgs/applications/networking/p2p/jesec-rtorrent/default.nix b/pkgs/applications/networking/p2p/jesec-rtorrent/default.nix
index 91a078590bf2..5a0cebc52819 100644
--- a/pkgs/applications/networking/p2p/jesec-rtorrent/default.nix
+++ b/pkgs/applications/networking/p2p/jesec-rtorrent/default.nix
@@ -65,5 +65,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ winter AndersonTorres ];
     platforms = platforms.linux;
+    mainProgram = "rtorrent";
   };
 }
diff --git a/pkgs/applications/networking/p2p/rakshasa-rtorrent/default.nix b/pkgs/applications/networking/p2p/rakshasa-rtorrent/default.nix
index fa459137f199..a6f59374db88 100644
--- a/pkgs/applications/networking/p2p/rakshasa-rtorrent/default.nix
+++ b/pkgs/applications/networking/p2p/rakshasa-rtorrent/default.nix
@@ -68,5 +68,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ ebzzry codyopel ];
     platforms = platforms.unix;
+    mainProgram = "rtorrent";
   };
 }