diff --git a/wp-admin/admin.php b/wp-admin/admin.php
index e6a4b2336c..010e4b347f 100644
--- a/wp-admin/admin.php
+++ b/wp-admin/admin.php
@@ -41,6 +41,7 @@ require(ABSPATH . '/wp-admin/menu.php');
 
 // Handle plugin admin pages.
 if (isset($_GET['page'])) {
+	$plugin_page = stripslashes($_GET['page']);
 	$plugin_page = plugin_basename($_GET['page']);
 	$page_hook = get_plugin_page_hook($plugin_page, $pagenow);
 
diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index ff653eb9c0..725b9a1e48 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -2142,7 +2142,6 @@ function register_deactivation_hook($file, $function) {
 
 function plugin_basename($file) {
 	$file = preg_replace('/^.*wp-content[\\\\\/]plugins[\\\\\/]/', '', $file);
-	$file = stripslashes($file);
 	return $file;
 }