diff --git a/src/road_type.h b/src/road_type.h
--- a/src/road_type.h
+++ b/src/road_type.h
@@ -27,7 +27,7 @@ enum RoadType {
 	INVALID_ROADTYPE = 0xFF ///< flag for invalid roadtype
 };
 DECLARE_POSTFIX_INCREMENT(RoadType)
-template <> struct EnumPropsT<RoadType> : MakeEnumPropsT<RoadType, byte, ROADTYPE_BEGIN, ROADTYPE_END, INVALID_ROADTYPE> {};
+template <> struct EnumPropsT<RoadType> : MakeEnumPropsT<RoadType, byte, ROADTYPE_BEGIN, ROADTYPE_END, INVALID_ROADTYPE, 2> {};
 
 /**
  * The different roadtypes we support, but then a bitmask of them
@@ -42,6 +42,7 @@ enum RoadTypes {
 	INVALID_ROADTYPES  = 0xFF                              ///< Invalid roadtypes
 };
 DECLARE_ENUM_AS_BIT_SET(RoadTypes)
+template <> struct EnumPropsT<RoadTypes> : MakeEnumPropsT<RoadTypes, byte, ROADTYPES_NONE, ROADTYPES_END, INVALID_ROADTYPES, 2> {};
 typedef SimpleTinyEnumT<RoadTypes, byte> RoadTypesByte;