diff --git a/frameworks/common/permission_definition_parser.py b/frameworks/common/permission_definition_parser.py
index 77feab9bd3cc7e1f84ffd04afaf3c13459a22374..cb822749a4aef0e8b563f8866ae063cfac693575 100755
--- a/frameworks/common/permission_definition_parser.py
+++ b/frameworks/common/permission_definition_parser.py
@@ -127,10 +127,14 @@ class PermissionDef(object):
             raise Exception("No deviceTypes in permission difinition of {}".format(self.name))
 
         if "deviceTypes" in permission_def_dict:
-            if len(permission_def_dict["deviceTypes"]) > 0:
-                self.device_types = permission_def_dict["deviceTypes"]
+            deviceTypes = permission_def_dict["deviceTypes"]
+            if not type(deviceTypes) is list:
+                raise Exception("DeviceTypes is not list.")
+
+            if len(deviceTypes) > 0:
+                self.device_types = deviceTypes
             else:
-                raise Exception("Must be filled with available device types")
+                raise Exception("DeviceTypes is emmpty.")
         else:
             self.device_types = ["general"]