diff --git a/dbService.py b/dbService.py
index 13e6bbe..9eac779 100644
--- a/dbService.py
+++ b/dbService.py
@@ -29,7 +29,7 @@ class MultiDeviceDbSupport:
             uuid = self.core.devicesUuidHashToUuid.get(hash, "")
             if uuid:
                 if uuid == self.core.defaultDeviceUUID:
-                    orPart.append({"device_uuid", None})
+                    orPart.append({"device_uuid": None})
                 orPart.append({"device_uuid": uuid})
         return orPart#-->{"$or": orPart}