diff --git a/bridge_master.py b/bridge_master.py
index 2be6e22..0dd382e 100644
--- a/bridge_master.py
+++ b/bridge_master.py
@@ -2064,7 +2064,7 @@ class routerHBP(HBSYSTEM):
         _bits = _data[15]
         
         #_pkt_crc = Crc32.calc(_data[4:53])
-        _pkt_crc = sha1(_data).hexdigest()
+        _pkt_crc = sha1(_data).digest()
         
         _nine = bytes_3(9)