diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index 0eebcb4462..29fc1d4122 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -1972,6 +1972,8 @@ static int hls_write_trailer(struct AVFormatContext *s)
     av_freep(&vs->baseurl);
     }
 
+    ff_format_io_close(s, &hls->m3u8_out);
+    ff_format_io_close(s, &hls->sub_m3u8_out);
     av_freep(&hls->key_basename);
     av_freep(&hls->var_streams);
     av_freep(&hls->master_m3u8_url);