diff --git a/show_vio_host_mappings b/show_vio_host_mappings
index 303763c..f8a6a13 100755
--- a/show_vio_host_mappings
+++ b/show_vio_host_mappings
@@ -550,8 +550,8 @@ if ( $options{'disks'} ) {
 			$vscsi{$vhost}->{'slot'},
 			"-",
 			"-",
-			$vscsi{$vhost}->{'lpar_number'},
-			$vscsi{$vhost}->{'lpar_name'},
+			$vscsi{$vhost}->{'lpar_number'} // "-",
+			$vscsi{$vhost}->{'lpar_name'} // "-",
 			"-",
 			"-",
 			"-",