diff --git a/wp-admin/includes/menu.php b/wp-admin/includes/menu.php
index 7edda12731..158b94574d 100644
--- a/wp-admin/includes/menu.php
+++ b/wp-admin/includes/menu.php
@@ -104,7 +104,7 @@ foreach ( $menu as $id => $data ) {
 
 	// If there is only one submenu and it is has same destination as the parent,
 	// remove the submenu.
-	if ( 1 == count ( $submenu[$data[2]] ) ) {
+	if ( ! empty( $submenu[$data[2]] ) && 1 == count ( $submenu[$data[2]] ) ) {
 		$subs = $submenu[$data[2]];
 		$first_sub = array_shift($subs);
 		if ( $data[2] == $first_sub[2] )