diff --git a/src/agent_gsm.py b/src/agent_gsm.py
index 7e7665e..d049e08 100644
--- a/src/agent_gsm.py
+++ b/src/agent_gsm.py
@@ -136,7 +136,7 @@ def upload_results():
             # Upload recorded audio
             upload_result = BackendServer.upload_audio(upload_id, path_audio)
             if upload_result:
-                utils.log('  Recorded audio {upload_id}.wav is uploaded ok.')
+                utils.log(f'  Recorded audio {upload_id}.wav is uploaded ok.')
                 os.remove(path_report)
                 os.remove(path_audio)
             else: