diff --git a/include/lassospkit_public_api.inc.php b/include/lassospkit_public_api.inc.php
index 6663dd6..0dc5934 100644
--- a/include/lassospkit_public_api.inc.php
+++ b/include/lassospkit_public_api.inc.php
@@ -184,6 +184,7 @@ function lassospkit_soap_defederate() {
     $session = new $session_class();
     $saml2 = new LassoSPKitSAML2($session);
     $ret = $saml2->initiateFTNotification(LASSO_HTTP_METHOD_SOAP);
+    lassospkit_clean();
     return $ret;
 }