diff --git a/bridge_master.py b/bridge_master.py
index 2ab808f..319438a 100644
--- a/bridge_master.py
+++ b/bridge_master.py
@@ -1464,8 +1464,8 @@ class routerOBP(OPENBRIDGE):
         pkt_time = time()
         dmrpkt = _data[20:53]
         _bits = _data[15]
-        #_pkt_crc = Crc16.calc(_data[4:53])
-        _pkt_crc = Crc16.calc(dmrpkt)
+        _pkt_crc = Crc16.calc(_data[5:53])
+        #_pkt_crc = Crc16.calc(dmrpkt)
         
 
         # Match UNIT data, SMS/GPS, and send it to the dst_id if it is in SUB_MAP