diff --git a/ship_cmd.c b/ship_cmd.c
--- a/ship_cmd.c
+++ b/ship_cmd.c
@@ -85,6 +85,9 @@ static void CheckIfShipNeedsService(Vehi
 {
 	int i;
 
+	if (_patches.servint_ships == 0 && IS_HUMAN_PLAYER(v->owner))
+		return;
+
 	if (v->date_of_last_service + v->service_interval > _date)
 		return;