diff --git a/libavformat/mov.c b/libavformat/mov.c
index 6fc792f..b06e9c8 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -4064,8 +4064,8 @@
 
     avio_rb32(pb);        /* entries */
 
-    if (atom.size < 8) {
-        av_log(c->fc, AV_LOG_ERROR, "senc atom size %"PRId64" too small\n", atom.size);
+    if (atom.size < 8 || atom.size > FFMIN(INT_MAX, SIZE_MAX)) {
+        av_log(c->fc, AV_LOG_ERROR, "senc atom size %"PRId64" invalid\n", atom.size);
         return AVERROR_INVALIDDATA;
     }