diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3e8480acf9..88d62fc71b 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41470';
+$wp_version = '4.9-alpha-41483';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index 5cc2be114f..c300e240f2 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -1243,7 +1243,7 @@ class wpdb {
 		}
 
 		foreach ( $args as $arg ) {
-			if ( ! is_scalar( $arg ) ) {
+			if ( ! is_scalar( $arg ) && ! is_null( $arg ) ) {
 				_doing_it_wrong( 'wpdb::prepare', sprintf( __( 'Unsupported value type (%s).' ), gettype( $arg ) ), '4.8.2' );
 			}
 		}