diff --git a/pkgs/roms/atetris.nix b/pkgs/roms/atetris.nix
index 8ced6b0..4433282 100644
--- a/pkgs/roms/atetris.nix
+++ b/pkgs/roms/atetris.nix
@@ -5,7 +5,7 @@ mkRetroarchRom {
 
   inherit settings;
 
-  emulator = "";
+  emulator = "fbneo";
   filename = "atetris.zip";
 
   meta = {
diff --git a/pkgs/roms/build/mkRetroarchRom.nix b/pkgs/roms/build/mkRetroarchRom.nix
index e7be293..32d5827 100644
--- a/pkgs/roms/build/mkRetroarchRom.nix
+++ b/pkgs/roms/build/mkRetroarchRom.nix
@@ -13,7 +13,9 @@ let
     inherit settings;
   };
 in
-mkRom ({
+mkRom (
+  assert lib.assertMsg (lib.stringLength emulator > 0) "Rom ${name} need an emulator name";
+{
   runtimeInputs = [ retroarch ];
   # To do add a check for the emulator
   command = "retroarch -L ${emulator} ${builtins.placeholder "out"}/usr/share/${filename}";