diff --git a/newgrf.c b/newgrf.c
--- a/newgrf.c
+++ b/newgrf.c
@@ -19,6 +19,7 @@
 #include "bridge.h"
 #include "economy.h"
 #include "newgrf_engine.h"
+#include "vehicle.h"
 
 /* TTDPatch extended GRF format codec
  * (c) Petr Baudis 2004 (GPL'd)