diff --git a/voice_recognition.py b/voice_recognition.py
index fbd626d..d91ecb4 100644
--- a/voice_recognition.py
+++ b/voice_recognition.py
@@ -132,7 +132,7 @@ class SRBuffer(voice_recv.AudioSink):
     def cleanup(self) -> None:
         try:
             logger.info("Cleanup for SRBuffer")
-            for _, item in self.wavewriter:
+            for item in self.wavewriter.values():
                 item.cleanup()
         except Exception:
             logger.warning("WaveSink got error closing file on cleanup", exc_info=True)