diff --git a/ai_build.c b/ai_build.c
--- a/ai_build.c
+++ b/ai_build.c
@@ -4,7 +4,7 @@
 #include "map.h"
 #include "tile.h"
 #include "command.h"
-#include "ai.h"
+#include "ai_new.h"
 #include "engine.h"
 #include "station.h"