diff --git a/js/ui/overview.js b/js/ui/overview.js
index c71b11389..12b966927 100644
--- a/js/ui/overview.js
+++ b/js/ui/overview.js
@@ -134,6 +134,10 @@ var Overview = class {
         return this._visibleTarget;
     }
 
+    get closing() {
+        return this._animationInProgress && !this._visibleTarget;
+    }
+
     _createOverview() {
         if (this._overview)
             return;