diff --git a/modules/saml/lib/SP/LogoutStore.php b/modules/saml/lib/SP/LogoutStore.php
index 787e563f68ca8c9a32c3ee052c045a736b949070..90104a27005b1663b0e6a494923fa18018a7cd3c 100644
--- a/modules/saml/lib/SP/LogoutStore.php
+++ b/modules/saml/lib/SP/LogoutStore.php
@@ -137,7 +137,7 @@ class sspmod_saml_SP_LogoutStore {
 
 		$res = array();
 		foreach ($sessionIndexes as $sessionIndex) {
-			$sessionId = $store->get('saml.LogoutStore', $strNameId . ':' . $sessionIndex);
+			$sessionId = $store->get('saml.LogoutStore', $nameId . ':' . $sessionIndex);
 			if ($sessionId === NULL) {
 				continue;
 			}