diff --git a/src/Factories/Traits/TraitS1207.php b/src/Factories/Traits/TraitS1207.php
index 82335023..2ba55531 100644
--- a/src/Factories/Traits/TraitS1207.php
+++ b/src/Factories/Traits/TraitS1207.php
@@ -309,8 +309,8 @@ protected function toNodeS110()
                 $this->dom->addChild(
                     $rra,
                     "nrProcRRA",
-                    $irra->nrprocrra,
-                    true
+                    $irra->nrprocrra ?? null,
+                    false
                 );
                 $this->dom->addChild(
                     $rra,