diff --git a/libavformat/rtpenc_mpegts.c b/libavformat/rtpenc_mpegts.c
index 7af02e0d2f..5f81e1a145 100644
--- a/libavformat/rtpenc_mpegts.c
+++ b/libavformat/rtpenc_mpegts.c
@@ -85,6 +85,10 @@ static int rtp_mpegts_write_header(AVFormatContext *s)
     }
     rtp_ctx->oformat = rtp_format;
     st = avformat_new_stream(rtp_ctx, NULL);
+    if (!st) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
     st->time_base.num   = 1;
     st->time_base.den   = 90000;
     st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;