diff --git a/wp-includes/class-wp-query.php b/wp-includes/class-wp-query.php
index baefec75b4..e20d574409 100644
--- a/wp-includes/class-wp-query.php
+++ b/wp-includes/class-wp-query.php
@@ -2405,7 +2405,7 @@ class WP_Query {
 			 *
 			 * @since 1.5.0
 			 *
-			 * @param string   $where The JOIN clause of the query.
+			 * @param string   $join  The JOIN clause of the query.
 			 * @param WP_Query &$this The WP_Query instance (passed by reference).
 			 */
 			$join = apply_filters_ref_array( 'posts_join', array( $join, &$this ) );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8a711f70f0..66d6b590b4 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-40911';
+$wp_version = '4.9-alpha-40912';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.