diff --git wp-admin/includes/plugin.php wp-admin/includes/plugin.php
index f305ef9..3a10edf 100644
--- wp-admin/includes/plugin.php
+++ wp-admin/includes/plugin.php
@@ -1528,9 +1528,9 @@ function get_plugin_page_hookname( $plugin_page, $parent_page ) {
 			$page_type = 'toplevel';
 		else
 			if ( isset( $admin_page_hooks[$parent] ))
-				$page_type = $admin_page_hooks[$parent];
+				$page_type = $parent;
 	} else if ( isset( $admin_page_hooks[$parent] ) ) {
-		$page_type = $admin_page_hooks[$parent];
+		$page_type = $parent;
 	}
 
 	$plugin_name = preg_replace( '!\.php!', '', $plugin_page );