diff --git a/lib/SimpleSAML/Auth/Simple.php b/lib/SimpleSAML/Auth/Simple.php
index 1ac3d9a6437cacf54001bc9605b96fd76fe7b809..e1ece69972f76b46363ca5b36289df6dc71ae6ba 100644
--- a/lib/SimpleSAML/Auth/Simple.php
+++ b/lib/SimpleSAML/Auth/Simple.php
@@ -134,7 +134,7 @@ class SimpleSAML_Auth_Simple {
 		}
 
 		$as = $this->getAuthSource();
-		$as->initLogin($this->authSource, $returnTo, $errorURL, $params);
+		$as->initLogin($returnTo, $errorURL, $params);
 		assert('FALSE');
 	}