diff --git a/gutenberg.php b/gutenberg.php
index 0ed4d2c47f689..a37f1f73f5565 100644
--- a/gutenberg.php
+++ b/gutenberg.php
@@ -474,6 +474,7 @@ function gutenberg_replace_default_add_new_button() {
 			display: block;
 			position: absolute;
 			margin-top: 3px;
+			z-index: 1;
 		}
 
 		.split-page-title-action .dropdown.visible a {