diff --git a/src/agents/voice/models/openai_stt.py b/src/agents/voice/models/openai_stt.py
index b1f1b6da7..1ae4ea147 100644
--- a/src/agents/voice/models/openai_stt.py
+++ b/src/agents/voice/models/openai_stt.py
@@ -226,7 +226,7 @@ async def _handle_events(self) -> None:
                     break
 
                 event_type = event.get("type", "unknown")
-                if event_type == "input_audio_transcription_completed":
+                if event_type == "conversation.item.input_audio_transcription.completed":
                     transcript = cast(str, event.get("transcript", ""))
                     if len(transcript) > 0:
                         self._end_turn(transcript)