diff --git a/src/zen/compact-mode/ZenCompactMode.mjs b/src/zen/compact-mode/ZenCompactMode.mjs
index e5b44d0d2..87d48e015 100644
--- a/src/zen/compact-mode/ZenCompactMode.mjs
+++ b/src/zen/compact-mode/ZenCompactMode.mjs
@@ -607,7 +607,7 @@ var gZenCompactModeManager = {
       target.addEventListener('mouseover', onEnter);
       target.addEventListener('dragover', onEnter);
 
-      target.addEventListener('mouseout', onLeave);
+      target.addEventListener('mouseleave', onLeave);
       target.addEventListener('dragleave', onLeave);
     }