diff --git a/src/revealers.js b/src/revealers.js
index 0a6630d6..2f8f585b 100644
--- a/src/revealers.js
+++ b/src/revealers.js
@@ -194,6 +194,7 @@ class ClapperRevealerTop extends CustomRevealer
 
         if(this.child_revealed) {
             const clapperWidget = this.root.child;
+            if(!clapperWidget) return;
 
             clapperWidget._setHideControlsTimeout();
         }