diff --git a/wp-admin/network/site-users.php b/wp-admin/network/site-users.php
index fcd1a863d0..eb96158c08 100644
--- a/wp-admin/network/site-users.php
+++ b/wp-admin/network/site-users.php
@@ -138,7 +138,14 @@ if ( $action ) {
 		case 'promote':
 			check_admin_referer( 'bulk-users' );
 			$editable_roles = get_editable_roles();
-			if ( empty( $editable_roles[ $_REQUEST['new_role'] ] ) ) {
+			$role = false;
+			if ( ! empty( $_REQUEST['new_role2'] ) ) {
+				$role = $_REQUEST['new_role2'];
+			} elseif ( ! empty( $_REQUEST['new_role'] ) ) {
+				$role = $_REQUEST['new_role'];
+			}
+
+			if ( empty( $editable_roles[ $role ] ) ) {
 				wp_die( __( 'Sorry, you are not allowed to give users that role.' ) );
 			}
 
@@ -158,7 +165,7 @@ if ( $action ) {
 					}
 
 					$user = get_userdata( $user_id );
-					$user->set_role( $_REQUEST['new_role'] );
+					$user->set_role( $role );
 				}
 			} else {
 				$update = 'err_promote';
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 65193c4ed5..11a38e4384 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-beta1-40779';
+$wp_version = '4.8-beta1-40780';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.