diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c
index c11244ef3d..4d6ae7abc5 100644
--- a/libavformat/sbgdec.c
+++ b/libavformat/sbgdec.c
@@ -538,6 +538,9 @@ static int parse_time_sequence(struct sbg_parser *p, int inblock)
         return AVERROR_INVALIDDATA;
     }
     ts.type = p->current_time.type;
+
+    if (av_sat_add64(p->current_time.t, rel_ts) != p->current_time.t + (uint64_t)rel_ts)
+        return AVERROR_INVALIDDATA;
     ts.t    = p->current_time.t + rel_ts;
     r = parse_fade(p, &fade);
     if (r < 0)