Ticket #15357: 15357.diff

wp-includes/capabilities.php

@@ -988 +988 @@
                 }
                 break;
         case 'create_users':
-                if ( is_multisite() && !get_site_option( 'add_new_users' ) )
-                        $caps[] = 'do_not_allow';
-                else
+                if ( !is_multisite() || is_super_admin() || get_site_option( 'add_new_users' ) )
                         $caps[] = $cap;
                 break;
         default: