diff --git a/libavformat/mov.c b/libavformat/mov.c
index 67dcbd5b7a..24c85e43bb 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -5041,6 +5041,8 @@ static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     avio_rb16(pb); // reserved
 
     item_count = avio_rb16(pb);
+    if (item_count == 0)
+        return AVERROR_INVALIDDATA;
 
     for (i = 0; i < item_count; i++) {
         int index;