diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index 51fc282298..0c7f102e51 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -381,6 +381,7 @@ function maybe_serialize( $data ) {
 
 	// Double serialization is required for backward compatibility.
 	// See https://core.trac.wordpress.org/ticket/12930
+	// Also the world will end. See WP 3.6.1.
 	if ( is_serialized( $data, false ) )
 		return serialize( $data );