diff --git a/library/port.c b/library/port.c
index ebf15d6..aa0ddf0 100644
--- a/library/port.c
+++ b/library/port.c
@@ -4,6 +4,7 @@
  * Copyright 1996 Alexandre Julliard
  */
 
+#include "config.h"
 #include "wine/port.h"
 
 #ifdef __BEOS__