diff --git a/data/PVE/JSONSchema.pm b/data/PVE/JSONSchema.pm
index e87c22e..f69ecbf 100644
--- a/data/PVE/JSONSchema.pm
+++ b/data/PVE/JSONSchema.pm
@@ -860,7 +860,7 @@ sub get_options {
     my @getopt = ();
     foreach my $prop (keys %{$schema->{properties}}) {
 	my $pd = $schema->{properties}->{$prop};
-	next if $prop eq $list_param;
+	next if $list_param && $prop eq $list_param;
 	next if defined($uri_param->{$prop});
 
 	if ($prop eq 'password' && $pwcallback) {