diff --git a/packages/block-library/src/gallery/style.scss b/packages/block-library/src/gallery/style.scss
index 3f5a462e3206c..afbc308804985 100644
--- a/packages/block-library/src/gallery/style.scss
+++ b/packages/block-library/src/gallery/style.scss
@@ -57,6 +57,7 @@ figure.wp-block-gallery.has-nested-images {
 			text-align: center;
 			width: 100%;
 			box-sizing: border-box;
+			@include custom-scrollbars-on-hover(transparent, rgba($white, 0.8));
 
 			img {
 				display: inline;