diff --git a/src/wp-includes/css/buttons.css b/src/wp-includes/css/buttons.css
index 5a8d3b2564..13ed8fbc38 100644
--- a/src/wp-includes/css/buttons.css
+++ b/src/wp-includes/css/buttons.css
@@ -170,6 +170,7 @@ TABLE OF CONTENTS:
 .wp-core-ui .button-disabled {
 	color: #aaa !important;
 	border-color: #ddd !important;
+	background: #f7f7f7 !important;
 	-webkit-box-shadow: none !important;
 	box-shadow: none !important;
 	text-shadow: 0 1px 0 #fff !important;