diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index f0fd326fb6..b1db03a893 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -344,7 +344,7 @@ static int read_header(AVFormatContext *s)
 
 found_data:
     if (caf->bytes_per_packet > 0 && caf->frames_per_packet > 0) {
-        if (caf->data_size > 0)
+        if (caf->data_size > 0 && caf->data_size / caf->bytes_per_packet < INT64_MAX / caf->frames_per_packet)
             st->nb_frames = (caf->data_size / caf->bytes_per_packet) * caf->frames_per_packet;
     } else if (st->nb_index_entries && st->duration > 0) {
         if (st->codecpar->sample_rate && caf->data_size / st->duration > INT64_MAX / st->codecpar->sample_rate / 8) {