$NetBSD$

--- lib/unicode/unicodeSimpleTypes.c.orig	2008-08-08 02:01:55.000000000 -0500
+++ lib/unicode/unicodeSimpleTypes.c
@@ -2198,7 +2198,7 @@ UnicodeNormalizeEncodingName(const char 
 
    for (currentResult = result; *encodingName != '\0'; encodingName++) {
       if (isalnum((int) *encodingName)) {
-         *currentResult = tolower(*encodingName);
+         *currentResult = tolower((int)(*encodingName));
          currentResult++;
       }
    }