diff --git a/modules/saml/lib/Auth/Source/SP.php b/modules/saml/lib/Auth/Source/SP.php
index c686968d8a4534eeb640761d410bffb3455f6913..4dd06c044dd70d429a350fce090ac9a29ae77e40 100644
--- a/modules/saml/lib/Auth/Source/SP.php
+++ b/modules/saml/lib/Auth/Source/SP.php
@@ -530,7 +530,7 @@ class SP extends \SimpleSAML\Auth\Source
                 $comp = $idpMetadata->getString('AuthnContextComparison');
             } elseif (
                 isset($state['saml:AuthnContextComparison'])
-                && in_array($state['AuthnContextComparison'], [
+                && in_array($state['saml:AuthnContextComparison'], [
                     Constants::COMPARISON_EXACT,
                     Constants::COMPARISON_MINIMUM,
                     Constants::COMPARISON_MAXIMUM,