diff --git a/Application/Admin/Controller/MemberController.class.php b/Application/Admin/Controller/MemberController.class.php
index fe33c0cf9..887d3f4f3 100644
--- a/Application/Admin/Controller/MemberController.class.php
+++ b/Application/Admin/Controller/MemberController.class.php
@@ -64,7 +64,7 @@ class MemberController extends ThinkController
 
         if (isset($_REQUEST['user_id'])) {
             empty($hav) || $hav .= ' AND ';
-            $hav .= "tab_user.id = {$_REQUEST['user_id']}";
+            $hav .= "tab_user.id = '{$_REQUEST['user_id']}'";
             $maps['tab_user.id'] = $_REQUEST['user_id'];
             unset($_REQUEST['user_id']);
         }