diff --git a/lib/SimpleSAML/XML/Shib13/AuthnResponse.php b/lib/SimpleSAML/XML/Shib13/AuthnResponse.php
index 7bbbe0bf92098c37ef9f7ce864be1c63d3658521..b023fa4192d9bf88f0e9c2084c2f8325ebb6130b 100644
--- a/lib/SimpleSAML/XML/Shib13/AuthnResponse.php
+++ b/lib/SimpleSAML/XML/Shib13/AuthnResponse.php
@@ -128,7 +128,7 @@ class AuthnResponse
     /**
      * Checks if the given node is validated by the signature on this response.
      *
-     * @param \DOMElement Node to be validated.
+     * @param \DOMElement $node Node to be validated.
      * @return bool TRUE if the node is validated or FALSE if not.
      */
     private function isNodeValidated($node)