diff --git a/generator/src/Method.php b/generator/src/Method.php
index 3e610500..592a08e4 100644
--- a/generator/src/Method.php
+++ b/generator/src/Method.php
@@ -177,7 +177,7 @@ private function removeString(string $string, string $search): string
     private function getStringForXPath(string $xpath): string
     {
         $paragraphs = $this->rootEntity->xpath($xpath);
-        if ($paragraphs === false) {
+        if ($paragraphs === false || $paragraphs === null) {
             throw new \RuntimeException('Error while performing Xpath request.');
         }
         $str = '';