diff --git a/library/Director/Objects/IcingaCommandArgument.php b/library/Director/Objects/IcingaCommandArgument.php
index 627a5b1a..be4db155 100644
--- a/library/Director/Objects/IcingaCommandArgument.php
+++ b/library/Director/Objects/IcingaCommandArgument.php
@@ -48,6 +48,17 @@ class IcingaCommandArgument extends IcingaObject
         // No log right now, we have to handle "sub-objects"
     }
 
+    public function replaceWith(IcingaObject $object)
+    {
+        $this->setProperties((array) $object->toPlainObject(
+            false,
+            false,
+            null,
+            false
+        ));
+        return $this;
+    }
+
     public function toPlainObject(
         $resolved = false,
         $skipDefaults = false,