diff --git a/webapp/controller/UserController.class.php b/webapp/controller/UserController.class.php
index 3c0cde25..c2c7782f 100644
--- a/webapp/controller/UserController.class.php
+++ b/webapp/controller/UserController.class.php
@@ -487,12 +487,23 @@ class UserController extends BaseAuthedController {
             myself()->_rspErr(1, 'item_id not found');
             return;
         }
-        $itemNum = myself()->_callModelStatic('Bag', 'getItemCount', $itemId);
-        myself()->_rspData(array(
-            'item_id' => $itemId,
-            'item_type' => $itemMeta['type'],
-            'item_sub_type' => $itemMeta['sub_type']
-        ));
+        if ($itemMeta['type'] == mt\Item::FUNC_TYPE &&
+            in_array($itemMeta['sub_type'],
+                     array(
+                         mt\Item::LUCKY_SYMBOL_SUBTYPE,
+                         mt\Item::BATTLE_POTION_SUBTYPE
+                     )
+            )) {
+            $itemNum = myself()->_callModelStatic('Bag', 'getItemCount', $itemId);
+            myself()->_rspData(array(
+                'item_id' => $itemId,
+                'item_type' => $itemMeta['type'],
+                'item_sub_type' => $itemMeta['sub_type']
+            ));
+        } else {
+            myself()->_rspErr(1, 'item_id not found');
+            return;
+        }
     }
 
     public function query()