diff --git a/Application/Admin/Controller/MemberController.class.php b/Application/Admin/Controller/MemberController.class.php
index cd17a1a14..0ea53fe74 100644
--- a/Application/Admin/Controller/MemberController.class.php
+++ b/Application/Admin/Controller/MemberController.class.php
@@ -70,7 +70,7 @@ class MemberController extends ThinkController
         }
         if (isset($_REQUEST['device_number'])) {
             empty($hav) || $hav .= ' AND ';
-            $hav .= "tab_user.device_number = {$_REQUEST['device_number']}";
+            $hav .= "tab_user.device_number = '{$_REQUEST['device_number']}'";
             $maps['tab_user.device_number'] = $_REQUEST['device_number'];
             unset($_REQUEST['device_number']);
         }