diff --git a/libs/wpp/ppl.l b/libs/wpp/ppl.l
index 5c39dbb97e3..4bb928c60f8 100644
--- a/libs/wpp/ppl.l
+++ b/libs/wpp/ppl.l
@@ -156,7 +156,8 @@ cident	[a-zA-Z_][0-9a-zA-Z_]*
 ul	[uUlL]|[uUlL][lL]|[lL][uU]|[lL][lL][uU]|[uU][lL][lL]|[lL][uU][lL]
 
 %{
-#include <config.h>
+#include "config.h"
+#include "wine/port.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>