diff --git a/src/wp-includes/css/media-views.css b/src/wp-includes/css/media-views.css
index 7bc3e136c4..802e9d94b0 100644
--- a/src/wp-includes/css/media-views.css
+++ b/src/wp-includes/css/media-views.css
@@ -254,20 +254,21 @@
 	-webkit-overflow-scrolling: touch;
 }
 
-.upload-php .mode-grid .hide-sidebar .media-sidebar {
-	top: 102px;
-	display: none;
-}
-
 .upload-php .mode-grid .media-sidebar {
-	background: #fff;
+	z-index: 1900;
+	top: 102px;
 	bottom: auto;
+	background: #fff;
 	border-left: none;
 	padding: 16px;
 	-webkit-box-shadow: -1px 0 1px rgba(0,0,0,.3);
 	box-shadow: -1px 0 1px rgba(0,0,0,.3);
 }
 
+.upload-php .mode-grid .hide-sidebar .media-sidebar {
+	display: none;
+}
+
 .upload-php .mode-grid .media-sidebar .media-uploader-status {
 	border-bottom: none;
 	padding-bottom: 0;