diff --git a/pkgs/applications/misc/syncthingtray/default.nix b/pkgs/applications/misc/syncthingtray/default.nix
index 6cded45faf1c..9acd79fbf379 100644
--- a/pkgs/applications/misc/syncthingtray/default.nix
+++ b/pkgs/applications/misc/syncthingtray/default.nix
@@ -120,5 +120,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ doronbehar ];
     platforms = platforms.linux ++ platforms.darwin;
+    mainProgram = "syncthingtray";
   };
 })