diff --git a/storage/synology/snmp/mode/upgrade.pm b/storage/synology/snmp/mode/upgrade.pm
index 65f532afd..5a5b40eba 100644
--- a/storage/synology/snmp/mode/upgrade.pm
+++ b/storage/synology/snmp/mode/upgrade.pm
@@ -51,7 +51,7 @@ sub custom_status_output {
 
     return sprintf(
         "'%s': version is '%s', upgrade is '%s'",
-        $options{instance_value}->{model},
+        $self->{result_values}->{model},
         $self->{result_values}->{version},
         $self->{result_values}->{upgrade}
     );