diff --git a/libavformat/utils.c b/libavformat/utils.c
index d84749699a..9fef5201fc 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2809,10 +2809,10 @@ void av_close_input_file(AVFormatContext *s)
 void avformat_close_input(AVFormatContext **ps)
 {
     AVFormatContext *s = *ps;
-    AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
+    AVIOContext *pb = (s->iformat && (s->iformat->flags & AVFMT_NOFILE)) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
                        NULL : s->pb;
     flush_packet_queue(s);
-    if (s->iformat->read_close)
+    if (s->iformat && (s->iformat->read_close))
         s->iformat->read_close(s);
     avformat_free_context(s);
     *ps = NULL;