diff --git a/pkgs/games/openloco/default.nix b/pkgs/games/openloco/default.nix
index f6eea70832b1..e64c6f6aa978 100644
--- a/pkgs/games/openloco/default.nix
+++ b/pkgs/games/openloco/default.nix
@@ -78,5 +78,6 @@ stdenv.mkDerivation rec {
     license = lib.licenses.mit;
     platforms = lib.platforms.linux;
     maintainers = with lib.maintainers; [ icewind1991 ];
+    mainProgram = "OpenLoco";
   };
 }