diff --git a/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/AuthSAML.pm b/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/AuthSAML.pm
index 92271edc5..3c6119ec3 100644
--- a/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/AuthSAML.pm
+++ b/modules/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/AuthSAML.pm
@@ -855,6 +855,7 @@ sub extractFormInfo {
     my $nameIDFormat =
       $self->{samlIDPMetaDataOptions}->{$idp}
       ->{samlIDPMetaDataOptionsNameIDFormat};
+    $nameIDFormat ||= "transient"; # Default to transient
     $nameIDFormat = $self->getNameIDFormat($nameIDFormat) if $nameIDFormat;
 
     # IDP HTTP method