diff --git a/core/achievement.js b/core/achievement.js
index 7b6a4b16..a5de541f 100644
--- a/core/achievement.js
+++ b/core/achievement.js
@@ -48,6 +48,9 @@ class Achievement {
     }
 
     static factory(data) {
+        if(!data) {
+            return;
+        }
         let achievement;
         switch(data.type) {
             case Achievement.Types.UserStatSet :