diff --git a/hblink.py b/hblink.py
index 6e7196f..9943d1c 100755
--- a/hblink.py
+++ b/hblink.py
@@ -137,12 +137,16 @@ class OPENBRIDGE(DatagramProtocol):
     def dereg(self):
         logger.info('(%s) is mode OPENBRIDGE. No De-Registration required, continuing shutdown', self._system)
 
-    def send_system(self, _packet,_hops = bytes(0)):                        
+    def send_system(self, _packet,_hops = False):                      
         #Don't do anything if we are STUNned
         if 'STUN' in self._CONFIG:
             logger.info('(%s) Bridge STUNned, discarding', self._system)
             return
         
+        if not _hops:
+            _hops = 0
+            _hops = _hops.to_bytes(1,'big')
+        
         if _packet[:3] == DMR and self._config['TARGET_IP']:
             if 'VER' in self._config and self._config['VER'] > 1:
                 _packet = b''.join([DMRF,_packet[4:11], self._CONFIG['GLOBAL']['SERVER_ID'],_packet[15:], time_ns().to_bytes(8,'big')])
@@ -203,7 +207,7 @@ class OPENBRIDGE(DatagramProtocol):
             
     
 
-    def dmrd_received(self, _peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data,_hash,_hops = bytes(0)):
+    def dmrd_received(self, _peer_id, _rf_src, _dst_id, _seq, _slot, _call_type, _frame_type, _dtype_vseq, _stream_id, _data,_hash,_hops = False):
         pass
         #print(int_id(_peer_id), int_id(_rf_src), int_id(_dst_id), int_id(_seq), _slot, _call_type, _frame_type, repr(_dtype_vseq), int_id(_stream_id))
 
@@ -315,7 +319,7 @@ class OPENBRIDGE(DatagramProtocol):
                 _hash = _packet[62:]
                 #_ckhs = hmac_new(self._config['PASSPHRASE'],_data,sha1).digest()
                 _h = blake2b(key=self._config['PASSPHRASE'], digest_size=16)
-                _h.update(_packet[:60])
+                _h.update(_packet[:61])
                 _ckhs = _h.digest()
 
                 if compare_digest(_hash, _ckhs) and (_sockaddr == self._config['TARGET_SOCK'] or self._config['RELAX_CHECKS']):