diff --git a/src/Welldom/XsltProcessor.php b/src/Welldom/XsltProcessor.php
index 4a67dde..87f2bf4 100644
--- a/src/Welldom/XsltProcessor.php
+++ b/src/Welldom/XsltProcessor.php
@@ -132,7 +132,7 @@ public function getParameter($name)
      */
     public function setParameter($name, $value)
     {
-        return $this->processor->setParameter('', $name, $value);
+        $this->processor->setParameter('', $name, $value);
 
         return $this;
     }