diff --git a/astrbot/core/provider/sources/whisper_api_source.py b/astrbot/core/provider/sources/whisper_api_source.py
index 8f6d9e292..8cc43d2aa 100644
--- a/astrbot/core/provider/sources/whisper_api_source.py
+++ b/astrbot/core/provider/sources/whisper_api_source.py
@@ -72,6 +72,6 @@ class ProviderOpenAIWhisperAPI(STTProvider):
 
         result = await self.client.audio.transcriptions.create(
             model=self.model_name,
-            file=open(audio_url, "rb"),
+            file=("audio.wav", open(audio_url, "rb")),
         )
         return result.text