diff --git a/src/ai/api/ai_object.hpp b/src/ai/api/ai_object.hpp
--- a/src/ai/api/ai_object.hpp
+++ b/src/ai/api/ai_object.hpp
@@ -31,7 +31,6 @@ typedef bool (AIModeProc)(TileIndex tile
 class AIObject : public SimpleCountedObject {
 friend void CcAI(bool success, TileIndex tile, uint32 p1, uint32 p2);
 friend class AIInstance;
-friend class AIController;
 protected:
 	/**
 	 * Executes a raw DoCommand for the AI.