diff --git a/src/wp-admin/css/media.css b/src/wp-admin/css/media.css
index e629aa8e7b..bfb7f67951 100644
--- a/src/wp-admin/css/media.css
+++ b/src/wp-admin/css/media.css
@@ -746,6 +746,9 @@ border color while dragging a file over the uploader drop area */
 	max-width: 100%;
 	max-height: 90%;
 	max-height: calc( 100% - 42px ); /* leave space for actions underneath */
+	background-image: linear-gradient(45deg, #c4c4c4 25%, transparent 25%, transparent 75%, #c4c4c4 75%, #c4c4c4), linear-gradient(45deg, #c4c4c4 25%, transparent 25%, transparent 75%, #c4c4c4 75%, #c4c4c4);
+	background-position: 0 0, 10px 10px;
+	background-size: 20px 20px;
 }
 
 .edit-attachment-frame .attachment-media-view .attachment-actions {