diff --git a/wp-admin/wp-admin.css b/wp-admin/wp-admin.css
index 53530d8fe7..a7e1b31454 100644
--- a/wp-admin/wp-admin.css
+++ b/wp-admin/wp-admin.css
@@ -1134,7 +1134,7 @@ html, body {
 	-khtml-border-top-left-radius: 3px;
 	-webkit-border-top-left-radius: 3px;
 	border-top-left-radius: 3px;
-	-moz-border-radius-bottomtop: 3px;
+	-moz-border-radius-topright: 3px;
 	-khtml-border-top-right-radius: 3px;
 	-webkit-border-top-right-radius: 3px;
 	border-top-right-radius: 3px;