diff --git a/lib/SAML2/SOAPClient.php b/lib/SAML2/SOAPClient.php
index 2c272f176e09bd3b40fe0e8d490ef98a184088be..cbc34d57fc6da4b03899ba5d5acf61c8cea468d7 100644
--- a/lib/SAML2/SOAPClient.php
+++ b/lib/SAML2/SOAPClient.php
@@ -80,7 +80,7 @@ class SAML2_SOAPClient {
 		$samlresponse = SAML2_Message::fromXML($samlresponse[0]);
 
 
-		simpleSAML_Logger::debug("Valid ArtifactResponse received from IdP");
+		SimpleSAML_Logger::debug("Valid ArtifactResponse received from IdP");
 
 		return $samlresponse;