diff --git a/src/openrct2/world/Location.hpp b/src/openrct2/world/Location.hpp
index f05d28b534..99cfbce164 100644
--- a/src/openrct2/world/Location.hpp
+++ b/src/openrct2/world/Location.hpp
@@ -267,6 +267,8 @@ struct TileCoordsXYZ
  */
 typedef uint8_t Direction;
 
+const Direction INVALID_DIRECTION = 0xFF;
+
 /**
  * Given a direction, return the direction that points the other way,
  * on the same axis.