===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mg/extend.c,v
retrieving revision 1.55
retrieving revision 1.56
diff -u -r1.55 -r1.56
--- src/usr.bin/mg/extend.c	2014/04/02 20:32:00	1.55
+++ src/usr.bin/mg/extend.c	2014/11/16 00:59:25	1.56
@@ -1,4 +1,4 @@
-/*	$OpenBSD: extend.c,v 1.55 2014/04/02 20:32:00 lum Exp $	*/
+/*	$OpenBSD: extend.c,v 1.56 2014/11/16 00:59:25 guenther Exp $	*/
 
 /* This file is in the public domain. */
 
@@ -446,7 +446,7 @@
 	for (i = 0; *str && i < MAXKEY; i++) {
 		/* XXX - convert numbers w/ strol()? */
 		if (*str == '^' && *(str + 1) !=  '\0') {
-			key.k_chars[i] = CCHR(toupper(*++str));
+			key.k_chars[i] = CCHR(toupper((unsigned char)*++str));
 		} else if (*str == '\\' && *(str + 1) != '\0') {
 			switch (*++str) {
 			case '^':