diff --git a/namegen.c b/namegen.c
--- a/namegen.c
+++ b/namegen.c
@@ -1,6 +1,7 @@
 #include "stdafx.h"
 #include "ttd.h"
 #include "debug.h"
+#include "namegen.h"
 #include "table/namegen.h"
 
 static inline uint32 SeedChance(int shift_by, int max, uint32 seed)