diff --git a/libavformat/oggparsevorbis.c b/libavformat/oggparsevorbis.c
index db462fc865..adf8f0360a 100644
--- a/libavformat/oggparsevorbis.c
+++ b/libavformat/oggparsevorbis.c
@@ -212,15 +212,15 @@ vorbis_header (AVFormatContext * s, int idx)
     struct oggvorbis_private *priv;
     int pkt_type = os->buf[os->pstart];
 
-    if (!(pkt_type & 1))
-        return 0;
-
     if (!os->private) {
         os->private = av_mallocz(sizeof(struct oggvorbis_private));
         if (!os->private)
             return 0;
     }
 
+    if (!(pkt_type & 1))
+        return 0;
+
     if (os->psize < 1 || pkt_type > 5)
         return -1;