diff --git a/libavformat/utils.c b/libavformat/utils.c
index 9228313a00..492e08562e 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -3988,7 +3988,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
 
             if (!st->r_frame_rate.num) {
                 if (    avctx->time_base.den * (int64_t) st->time_base.num
-                    <= avctx->time_base.num * avctx->ticks_per_frame * (uint64_t) st->time_base.den) {
+                    <= avctx->time_base.num * (uint64_t)avctx->ticks_per_frame * st->time_base.den) {
                     av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
                               avctx->time_base.den, (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX);
                 } else {