diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index 832b7f4b9c..7686f28c62 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -314,7 +314,7 @@ static int open_file(AVFormatContext *avf, unsigned fileno)
         file->start_time = !fileno ? 0 :
                            cat->files[fileno - 1].start_time +
                            cat->files[fileno - 1].duration;
-    file->file_start_time = (avf->start_time == AV_NOPTS_VALUE) ? 0 : avf->start_time;
+    file->file_start_time = (cat->avf->start_time == AV_NOPTS_VALUE) ? 0 : cat->avf->start_time;
     file->file_inpoint = (file->inpoint == AV_NOPTS_VALUE) ? file->file_start_time : file->inpoint;
     if ((ret = match_streams(avf)) < 0)
         return ret;