diff --git a/bridge_master.py b/bridge_master.py
index 25c9522..7bce9f0 100644
--- a/bridge_master.py
+++ b/bridge_master.py
@@ -1493,7 +1493,7 @@ class routerOBP(OPENBRIDGE):
                     'lastData': False,
                     'RX_PEER': _peer_id,
                     'packets': 0,
-                    'crcs': []
+                    'crcs': set()
 
                 }