diff --git a/src/components/views/rooms/AppsDrawer.tsx b/src/components/views/rooms/AppsDrawer.tsx
index 5a14e6b315..4c6b8db02e 100644
--- a/src/components/views/rooms/AppsDrawer.tsx
+++ b/src/components/views/rooms/AppsDrawer.tsx
@@ -317,7 +317,7 @@ const PersistentVResizer: React.FC<IPersistentResizerProps> = ({
     });
 
     return <Resizable
-        size={{ height: Math.min(height, maxHeight), width: null }}
+        size={{ height: Math.min(height, maxHeight), width: undefined }}
         minHeight={minHeight}
         maxHeight={maxHeight}
         onResizeStart={() => {