diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
index 16d1e48c51..640979cb7a 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
@@ -174,7 +174,6 @@ class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {
 
 		// Include admin function to get access to wp_generate_attachment_metadata().
 		require_once ABSPATH . 'wp-admin/includes/media.php';
-		require_once ABSPATH . 'wp-admin/includes/image.php';
 
 		wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 9dccf35638..3c2587cdf2 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-44308';
+$wp_version = '5.1-alpha-44309';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.