diff --git a/pkgs/tools/security/zsteg/default.nix b/pkgs/tools/security/zsteg/default.nix
index 7c997f6e51de..a2134d468f00 100644
--- a/pkgs/tools/security/zsteg/default.nix
+++ b/pkgs/tools/security/zsteg/default.nix
@@ -12,5 +12,6 @@ bundlerApp {
     homepage = "http://zed.0xff.me/";
     license = licenses.mit;
     maintainers = with maintainers; [ applePrincess h7x4 ];
+    mainProgram = "zsteg";
   };
 }