diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index a32c6d6787..3b898da53b 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -1400,7 +1400,8 @@ static int mpegts_write_end(AVFormatContext *s)
     MpegTSService *service;
     int i;
 
-    mpegts_write_flush(s);
+    if (s->pb)
+        mpegts_write_flush(s);
 
     for (i = 0; i < s->nb_streams; i++) {
         AVStream *st = s->streams[i];