diff --git a/yt_dlp/extractor/radiko.py b/yt_dlp/extractor/radiko.py
index 8c8fb1a8f..c363d9ba5 100644
--- a/yt_dlp/extractor/radiko.py
+++ b/yt_dlp/extractor/radiko.py
@@ -154,7 +154,7 @@ def _extract_formats(self, video_id, station, is_onair, ft, cursor, auth_token,
                     sf['preference'] = -100
                     sf['format_note'] = 'not preferred'
                 if not is_onair and timefree_int == 1 and time_to_skip:
-                    sf['downloader_options'] = {'ffmpeg_args': ['-ss', time_to_skip]}
+                    sf['downloader_options'] = {'ffmpeg_args': ['-ss', str(time_to_skip)]}
             formats.extend(subformats)
 
         return formats