Index: src/order_cmd.cpp
===================================================================
--- src/order_cmd.cpp	(revision 27051)
+++ src/order_cmd.cpp	(working copy)
@@ -1904,7 +1904,7 @@
 	const Order *order;
 
 	FOR_VEHICLE_ORDERS(this, order) {
-		if (order->IsType(OT_GOTO_DEPOT)) return true;
+		if (order->IsType(OT_GOTO_DEPOT) || (order->IsType(OT_CONDITIONAL) && (order->GetConditionVariable() == OCV_REQUIRES_SERVICE))) return true;
 	}
 
 	return false;