diff --git a/backend/open_webui/routers/audio.py b/backend/open_webui/routers/audio.py
index 5952bb59c..9f053351d 100644
--- a/backend/open_webui/routers/audio.py
+++ b/backend/open_webui/routers/audio.py
@@ -86,8 +86,7 @@ def get_audio_format(file_path):
         return "mp4"
     elif info.get("format_name") == "ogg":
         return "ogg"
-    elif info.get("format_name") == "matroska,webm":
-        return "webm"
+
     return None