diff --git a/CHANGELOG.md b/CHANGELOG.md
index aca814e7e..529ece30f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,7 +41,7 @@ async def on_audio_data(processor, audio, sample_rate, num_channels):
 
 ### Changed
 
-- `STTMuteFilter` now supports multiple simultaneous muting strategies
+- `STTMuteFilter` now supports multiple simultaneous muting strategies.
 
 - `XTTSService` language now defaults to `Language.EN`.
 
diff --git a/src/pipecat/processors/filters/stt_mute_filter.py b/src/pipecat/processors/filters/stt_mute_filter.py
index 95576dc07..914198e5a 100644
--- a/src/pipecat/processors/filters/stt_mute_filter.py
+++ b/src/pipecat/processors/filters/stt_mute_filter.py
@@ -129,9 +129,8 @@ class STTMuteFilter(FrameProcessor):
         elif isinstance(frame, FunctionCallResultFrame):
             self._function_call_in_progress = False
             await self._handle_mute_state(await self._should_mute())
-
         # Handle bot speaking state changes
-        if isinstance(frame, BotStartedSpeakingFrame):
+        elif isinstance(frame, BotStartedSpeakingFrame):
             self._bot_is_speaking = True
             await self._handle_mute_state(await self._should_mute())
         elif isinstance(frame, BotStoppedSpeakingFrame):