diff --git a/src/data/mime_db/video/mp4 b/src/data/mime_db/video/mp4
index 2fa0623be0..034f072827 100644
--- a/src/data/mime_db/video/mp4
+++ b/src/data/mime_db/video/mp4
@@ -12,3 +12,4 @@ resource(3, "META:EXTENS") message(234) {
 	"type" = "video/mp4"
 };
 
+resource(4, "META:SNIFF_RULE") "0.60 (\"\\000\\000\\000\\034ftypmp42\")";