diff --git a/packages/block-editor/src/components/iframe/index.js b/packages/block-editor/src/components/iframe/index.js
index b7c25fe7dc84b1..c6639f9e057e1c 100644
--- a/packages/block-editor/src/components/iframe/index.js
+++ b/packages/block-editor/src/components/iframe/index.js
@@ -71,7 +71,7 @@ function bubbleEvents( doc ) {
 		}
 	}
 
-	const eventTypes = [ 'dragover' ];
+	const eventTypes = [ 'dragover', 'mousemove' ];
 
 	for ( const name of eventTypes ) {
 		doc.addEventListener( name, bubbleEvent );