--- src/XawI18n.c.orig	2007-01-23 17:57:23.950559108 +0100
+++ src/XawI18n.c	2007-01-23 17:57:49.881027639 +0100
@@ -96,7 +96,7 @@
 int
 _Xaw_iswalnum(wchar_t ch)
 {
-    unsigned char mb[sizeof(wchar_t)];
+    unsigned char mb[MB_CUR_MAX];
 
     wctomb((char*)mb, ch);