diff --git a/src/wp-admin/css/nav-menus.css b/src/wp-admin/css/nav-menus.css
index 77c6274c24..4021b03b94 100644
--- a/src/wp-admin/css/nav-menus.css
+++ b/src/wp-admin/css/nav-menus.css
@@ -785,7 +785,8 @@ body.menu-max-depth-11 { min-width: 1280px !important; }
 }
 
 @media screen and ( max-width: 782px ) {
-	body.nav-menus-php {
+	body.nav-menus-php,
+	body.wp-customizer {
 		min-width: 0 !important;
 	}