diff --git a/libavformat/dhav.c b/libavformat/dhav.c
index 9d26efe8fc..4e720f2a26 100644
--- a/libavformat/dhav.c
+++ b/libavformat/dhav.c
@@ -242,7 +242,7 @@ static int64_t get_duration(AVFormatContext *s)
     avio_seek(s->pb, avio_size(s->pb) - 8, SEEK_SET);
     while (avio_tell(s->pb) > 12 && max_interations--) {
         if (avio_rl32(s->pb) == MKTAG('d','h','a','v')) {
-            int seek_back = avio_rl32(s->pb);
+            int64_t seek_back = avio_rl32(s->pb);
 
             avio_seek(s->pb, -seek_back, SEEK_CUR);
             read_chunk(s);