diff --git a/mod/quiz/timer.js b/mod/quiz/timer.js
index 3e1ed752678..babc318204a 100644
--- a/mod/quiz/timer.js
+++ b/mod/quiz/timer.js
@@ -21,6 +21,7 @@ function countdown_clock(theTimer) {
 	        ourForm.onsubmit();
 	    }
         ourForm.submit();
+        return;
     }
 
     now = quizTimerValue;