1 files changed, 1 insertions, 0 deletions
diff --git a/ai_new.c b/ai_new.c
index ec122ba1f..d1e7f4a2c 100644
--- a/ai_new.c
+++ b/ai_new.c
@@ -18,6 +18,7 @@
 #include "stdafx.h"
 #include "openttd.h"
 #include "debug.h"
+#include "functions.h"
 #include "table/strings.h"
 #include "map.h"
 #include "tile.h"