diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index 69d897efc1..ba96b089e5 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -441,6 +441,7 @@ if ( ! CUSTOM_TAGS ) {
 		'q' => array(
 			'cite' => true,
 		),
+		's' => array(),
 		'strike' => array(),
 		'strong' => array(),
 	);
diff --git a/wp-includes/version.php b/wp-includes/version.php
index a98462c4f7..271e483ca8 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31204';
+$wp_version = '4.2-alpha-31205';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.