diff -r d901f00aeed6 -r 0d9a6bee8bf3 src/newgrf.cpp
--- a/src/newgrf.cpp	Tue Jun 03 08:06:58 2008 +0000
+++ b/src/newgrf.cpp	Tue Jun 03 09:58:13 2008 +0000
@@ -3302,7 +3302,7 @@
 			case GSF_ROAD:
 			case GSF_SHIP:
 			case GSF_AIRCRAFT:
-				if (id < GetEnginePoolSize()) {
+				if (!generic) {
 					Engine *e = GetNewEngine(_cur_grffile, (VehicleType)feature, id);
 					StringID string = AddGRFString(_cur_grffile->grfid, e->index, lang, new_scheme, name, e->info.string_id);
 					e->info.string_id = string;