diff --git a/CHANGELOG.md b/CHANGELOG.md
index 634a740e7..a0dcf9af1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -91,6 +91,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed a `BaseOutputTransport` issue that was causing upstream frames to no be
+  pushed upstream.
+
 - Fixed multiple issue where user transcriptions where not being handled
   properly. It was possible for short utterances to not trigger VAD which would
   cause user transcriptions to be ignored. It was also possible for one or more
diff --git a/src/pipecat/transports/base_output.py b/src/pipecat/transports/base_output.py
index 6bf4a9ff3..1b6d1e833 100644
--- a/src/pipecat/transports/base_output.py
+++ b/src/pipecat/transports/base_output.py
@@ -170,6 +170,8 @@ class BaseOutputTransport(FrameProcessor):
         # TODO(aleix): Images and audio should support presentation timestamps.
         elif frame.pts:
             await self._sink_clock_queue.put((frame.pts, frame.id, frame))
+        elif direction == FrameDirection.UPSTREAM:
+            await self.push_frame(frame, direction)
         else:
             await self._sink_queue.put(frame)