diff --git a/RNS/Interfaces/Interface.py b/RNS/Interfaces/Interface.py
index d0afb51..9ba3996 100755
--- a/RNS/Interfaces/Interface.py
+++ b/RNS/Interfaces/Interface.py
@@ -68,6 +68,7 @@ class Interface:
         self.txb = 0
         self.created = time.time()
         self.online = False
+        self.bitrate = 1e6
 
         self.ingress_control = True
         self.ic_max_held_announces = Interface.MAX_HELD_ANNOUNCES
diff --git a/RNS/Transport.py b/RNS/Transport.py
index ca40d30..e41ffba 100755
--- a/RNS/Transport.py
+++ b/RNS/Transport.py
@@ -876,7 +876,7 @@ class Transport:
                                             interface.announce_queue = []
 
                                     queued_announces = True if len(interface.announce_queue) > 0 else False
-                                    if not queued_announces and outbound_time > interface.announce_allowed_at:
+                                    if not queued_announces and outbound_time > interface.announce_allowed_at and interface.bitrate != None and interface.bitrate != 0:
                                         tx_time   = (len(packet.raw)*8) / interface.bitrate
                                         wait_time = (tx_time / interface.announce_cap)
                                         interface.announce_allowed_at = outbound_time + wait_time