diff --git a/libavformat/segment.c b/libavformat/segment.c
index fd5283560e5c73b0e5b13e3d0d0666f4adb8f544..8afb41f93dae9e7fac5ea008106bab28c56b1754 100644
--- a/libavformat/segment.c
+++ b/libavformat/segment.c
@@ -210,7 +210,7 @@ static int seg_write_header(AVFormatContext *s)
     }
     if (seg->oformat->flags & AVFMT_NOFILE) {
         av_log(s, AV_LOG_ERROR, "format %s not supported.\n",
-               oc->oformat->name);
+               seg->oformat->name);
         ret = AVERROR(EINVAL);
         goto fail;
     }