diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index 09839f2d15..41e66570fc 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -503,6 +503,8 @@ static int concat_read_header(AVFormatContext *avf)
             cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint;
         }
         cat->files[i].duration = cat->files[i].user_duration;
+        if (time + (uint64_t)cat->files[i].user_duration > INT64_MAX)
+            return AVERROR_INVALIDDATA;
         time += cat->files[i].user_duration;
     }
     if (i == cat->nb_files) {