diff --git a/libavformat/mov.c b/libavformat/mov.c
index f8248ab65b..3ec0ea2361 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -7381,7 +7381,7 @@ static int mov_read_SA3D(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     }
 
     channel_count = avio_rb32(pb);
-    if (channel_count != (ambisonic_order + 1) * (ambisonic_order + 1)) {
+    if (ambisonic_order < 0 || channel_count != (ambisonic_order + 1LL) * (ambisonic_order + 1LL)) {
         av_log(c->fc, AV_LOG_ERROR,
                "Invalid number of channels (%d / %d)\n",
                channel_count, ambisonic_order);