diff --git a/hblink.py b/hblink.py
index 843fb36..cb2b684 100755
--- a/hblink.py
+++ b/hblink.py
@@ -806,6 +806,10 @@ class HBSYSTEM(DatagramProtocol):
         logger.info('(%s) De-Registration sent to Master: %s:%s', self._system, self._config['MASTER_SOCKADDR'][0], self._config['MASTER_SOCKADDR'][1])
         
     def validate_id(self,_peer_id):
+        
+        if 'ALLOW_UNREG_ID' not in self._config:
+            return True
+        
         if 'ALLOW_UNREG_ID' in self._config and self._config['ALLOW_UNREG_ID']:
             return True