Index: alpine-2.00/pith/charconv/utf8.c
===================================================================
--- alpine-2.00.orig/pith/charconv/utf8.c
+++ alpine-2.00/pith/charconv/utf8.c
@@ -38,6 +38,7 @@ static char rcsid[] = "$Id: utf8.c 1019
 #include "utf8.h"
 
 #include <stdarg.h>
+#include <wchar.h>
 
 
 unsigned single_width_chars_a_to_b(UCS *, int, int);