diff --git a/controllers/service.py b/controllers/service.py
index 1594cac0b0009d2e65939c39811ee4a58658868d..24cc002caeb911eadac076fe57a1b920f705e52f 100644
--- a/controllers/service.py
+++ b/controllers/service.py
@@ -52,7 +52,7 @@ class storage_service(object):
     @classmethod
     def getItem(self, key, value=''):
         res = Storage.getItem(key,value)
-        if str(res) == '0' or str(res) == 'false' or str(res) == 'False':
+        if not str(res) or str(res) == '0' or str(res) == 'false' or str(res) == 'False':
             return 0
         return res