diff --git a/check_online_status b/check_online_status
index ef69347..6fdd814 100644
--- a/check_online_status
+++ b/check_online_status
@@ -167,7 +167,7 @@ sub get_ip_from_interface
 		}
 	}
 
-	my @addresses = $interface->address($_family);
+	my @addresses = $interface->address($_family) if defined $interface;
 
 	foreach my $ip (@addresses)
 	{