diff --git a/racket/src/cs/rumble/engine.ss b/racket/src/cs/rumble/engine.ss
index 0a1c1fef0b..91fcf7a72a 100644
--- a/racket/src/cs/rumble/engine.ss
+++ b/racket/src/cs/rumble/engine.ss
@@ -122,7 +122,7 @@
   (end-uninterrupted 'reset)
   (if (currently-in-engine?)
       (engine-return (void))
-      (chez:exit)))
+      (#%exit 1)))
 
 (define (engine-block-via-timer)
   (cond