diff --git a/src/pipecat/audio/mixers/base_audio_mixer.py b/src/pipecat/audio/mixers/base_audio_mixer.py
index bd9d03b89..0ba212d85 100644
--- a/src/pipecat/audio/mixers/base_audio_mixer.py
+++ b/src/pipecat/audio/mixers/base_audio_mixer.py
@@ -6,7 +6,7 @@
 
 from abc import ABC, abstractmethod
 
-from pipecat.frames.frames import Frame
+from pipecat.frames.frames import MixerControlFrame
 
 
 class BaseAudioMixer(ABC):
@@ -36,7 +36,7 @@ class BaseAudioMixer(ABC):
         pass
 
     @abstractmethod
-    async def process_frame(self, frame: Frame):
+    async def process_frame(self, frame: MixerControlFrame):
         """This will be called when the output transport receives a
         MixerControlFrame.
 
diff --git a/src/pipecat/audio/mixers/soundfile_mixer.py b/src/pipecat/audio/mixers/soundfile_mixer.py
index a9a17a106..f2fa20654 100644
--- a/src/pipecat/audio/mixers/soundfile_mixer.py
+++ b/src/pipecat/audio/mixers/soundfile_mixer.py
@@ -12,7 +12,7 @@ import numpy as np
 
 from pipecat.audio.mixers.base_audio_mixer import BaseAudioMixer
 from pipecat.audio.utils import resample_audio
-from pipecat.frames.frames import Frame, MixerUpdateSettingsFrame, MixerEnableFrame
+from pipecat.frames.frames import MixerControlFrame, MixerUpdateSettingsFrame, MixerEnableFrame
 
 from loguru import logger
 
@@ -65,7 +65,7 @@ class SoundfileMixer(BaseAudioMixer):
     async def stop(self):
         pass
 
-    async def process_frame(self, frame: Frame):
+    async def process_frame(self, frame: MixerControlFrame):
         if isinstance(frame, MixerUpdateSettingsFrame):
             await self._update_settings(frame)
         elif isinstance(frame, MixerEnableFrame):