diff -r b2cc6f31363c -r 5f26f4bc574b src/ai/api/ai_road.hpp
--- a/src/ai/api/ai_road.hpp	Sun Mar 25 15:22:56 2007 +0000
+++ b/src/ai/api/ai_road.hpp	Sun Mar 25 16:10:40 2007 +0000
@@ -23,6 +23,11 @@
 class AIRoad : public AIObject {
 public:
 	/**
+	 * The name of the class, needed by several sub-processes.
+	 */
+	static const char *GetClassName() { return "AIRoad"; }
+
+	/**
 	 * Checks whether the given tile is actually a tile with road.
 	 * @param tile the tile to check.
 	 * @pre tile is always positive and smaller than AIMap::GetMapSize().