diff --git a/wp-includes/comment-template.php b/wp-includes/comment-template.php
index 8f34b3e643..14105ace2a 100644
--- a/wp-includes/comment-template.php
+++ b/wp-includes/comment-template.php
@@ -1649,7 +1649,7 @@ function comment_id_fields( $id = 0 ) {
  * @param string $deprecated   No longer used.
  * @param string $deprecated_2 No longer used.
  */
-function comment_form_title( $noreplytext, $deprecated = null, $deprecated_2 = null ) {
+function comment_form_title( $noreplytext = false, $deprecated = null, $deprecated_2 = null ) {
 	if ( ! is_null( $deprecated ) )
 		_deprecated_argument( __FUNCTION__, '4.3' );
 	if ( ! is_null( $deprecated_2 ) )
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0508db1451..008c4e62d8 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-33038';
+$wp_version = '4.3-alpha-33039';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.