diff --git a/libavfilter/vf_aspect.c b/libavfilter/vf_aspect.c
index bf30824851..81a7e263d5 100644
--- a/libavfilter/vf_aspect.c
+++ b/libavfilter/vf_aspect.c
@@ -104,7 +104,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
 static inline void compute_dar(AVRational *dar, AVRational sar, int w, int h)
 {
     if (sar.num && sar.den) {
-        av_reduce(&dar->num, &dar->den, sar.num * w, sar.den * h, INT_MAX);
+        av_reduce(&dar->num, &dar->den, sar.num * (int64_t)w, sar.den * (int64_t)h, INT_MAX);
     } else {
         av_reduce(&dar->num, &dar->den, w, h, INT_MAX);
     }