diff --git a/libavformat/oggenc.c b/libavformat/oggenc.c
index 4398b20a7c..4ba6940d10 100644
--- a/libavformat/oggenc.c
+++ b/libavformat/oggenc.c
@@ -427,6 +427,9 @@ static int ogg_write_header(AVFormatContext *s)
             return -1;
         }
         oggstream = av_mallocz(sizeof(*oggstream));
+        if (!oggstream)
+            return AVERROR(ENOMEM);
+
         oggstream->page.stream_index = i;
 
         if (!(st->codec->flags & CODEC_FLAG_BITEXACT))