diff --git a/eg/c64/demo-game/demo-game.60p b/eg/c64/demo-game/demo-game.60p
index 31d9f97..b97a479 100644
--- a/eg/c64/demo-game/demo-game.60p
+++ b/eg/c64/demo-game/demo-game.60p
@@ -425,7 +425,7 @@ define game_state_game_over game_state_routine
 // * Main Game Loop Driver *
 // *************************
 
-define our_cinv game_state_routine
+define our_cinv preserved game_state_routine
 {
     goto dispatch_game_state
 }