diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
index 44d7b2a9cc..4b10f91660 100644
--- a/libavformat/hlsenc.c
+++ b/libavformat/hlsenc.c
@@ -777,7 +777,7 @@ static int do_encrypt(AVFormatContext *s, VariantStream *vs)
             return ret;
         avio_seek(pb, 0, SEEK_CUR);
         avio_write(pb, key, KEYSIZE);
-        avio_close(pb);
+        ff_format_io_close(s, &pb);
     }
     return 0;
 }