diff --git a/lib/zin/core/command.class.php b/lib/zin/core/command.class.php
index d1d67d28dc..5698d74d16 100644
--- a/lib/zin/core/command.class.php
+++ b/lib/zin/core/command.class.php
@@ -61,6 +61,11 @@ class command
         $node->add(text(...$args));
     }
 
+    public static function empty(node $node, array $args)
+    {
+        $node->empty();
+    }
+
     public static function prepend(node $node, array $args)
     {
         $node->add($args, 'children', true);