diff --git a/webapp/models/Gun.php b/webapp/models/Gun.php
index b90c675d..45978fde 100644
--- a/webapp/models/Gun.php
+++ b/webapp/models/Gun.php
@@ -176,7 +176,7 @@ class Gun extends BaseModel {
             'gun_lv' => 1,
             'quality' => 1,
             'state' => self::GETED_STATE,
-            'durability' => $gunMeta['init_durability'],
+            'durability' => $gunMeta['init_durability'] ? $gunMeta['init_durability'] : 0,
             'rand_attr' => json_encode($randAttr),
             'lock_type' => self::NO_LOCK,
             'unlock_time' => 0,