diff --git a/modules/saml/lib/Message.php b/modules/saml/lib/Message.php
index 03d3949a597a44db7d5f1846ec1a582068cfb007..a8bc8163d698ac9e12d3803e6defa3000f0a5603 100644
--- a/modules/saml/lib/Message.php
+++ b/modules/saml/lib/Message.php
@@ -588,7 +588,7 @@ class sspmod_saml_Message {
 		$found = FALSE;
 		$lastError = 'No SubjectConfirmation element in Subject.';
 		foreach ($assertion->getSubjectConfirmation() as $sc) {
-			if ($sc->Method !== SAML2_Const::CM_BEARER && $sc->Method !== SAML2_Const::CM_HOK) {
+			if ($sc->Method !== SAML2_Const::CM_BEARER && $sc->Method !== SAML2_Const::CM_HOK && $sc->Method !== SAML2_Const::CM_VOUCHES) {
 				$lastError = 'Invalid Method on SubjectConfirmation: ' . var_export($sc->Method, TRUE);
 				continue;
 			}