diff --git a/pkgs/applications/misc/wordnet/default.nix b/pkgs/applications/misc/wordnet/default.nix
index 27694174d703..5b52caeaf1ad 100644
--- a/pkgs/applications/misc/wordnet/default.nix
+++ b/pkgs/applications/misc/wordnet/default.nix
@@ -50,5 +50,6 @@ stdenv.mkDerivation rec {
     };
     maintainers = [ ];
     platforms = with lib.platforms; linux ++ darwin;
+    mainProgram = "wn";
   };
 }