diff --git a/src/pipecat/transports/base_output.py b/src/pipecat/transports/base_output.py
index b679a50c1..fa5d5e1c4 100644
--- a/src/pipecat/transports/base_output.py
+++ b/src/pipecat/transports/base_output.py
@@ -380,7 +380,9 @@ class BaseOutputTransport(FrameProcessor):
 
         async def _bot_started_speaking(self):
             if not self._bot_speaking:
-                logger.debug(f"Bot [{self._destination}] started speaking")
+                logger.debug(
+                    f"Bot{f' [{self._destination}]' if self._destination else ''} started speaking"
+                )
 
                 downstream_frame = BotStartedSpeakingFrame()
                 downstream_frame.transport_destination = self._destination
@@ -393,7 +395,9 @@ class BaseOutputTransport(FrameProcessor):
 
         async def _bot_stopped_speaking(self):
             if self._bot_speaking:
-                logger.debug(f"Bot [{self._destination}] stopped speaking")
+                logger.debug(
+                    f"Bot{f' [{self._destination}]' if self._destination else ''} stopped speaking"
+                )
 
                 downstream_frame = BotStoppedSpeakingFrame()
                 downstream_frame.transport_destination = self._destination