1 files changed, 3 insertions, 0 deletions
diff --git a/vehicle.h b/vehicle.h
index f0699b5a6..a760cbf2b 100644
--- a/vehicle.h
+++ b/vehicle.h
@@ -420,6 +420,9 @@ static inline Vehicle *GetFirstVehicleFromSharedList(Vehicle *v)
 	return u;
 }
 
+/* Validate functions for rail building */
+static inline bool ValParamRailtype(uint32 rail) { return rail <= GetPlayer(_current_player)->max_railtype;}
+
 // NOSAVE: Can be regenerated by inspecting the vehicles.
 VARDEF VehicleID _vehicle_position_hash[0x1000];