===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/systat/engine.c,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -r1.15 -r1.16
--- src/usr.bin/systat/engine.c	2013/09/07 11:43:49	1.15
+++ src/usr.bin/systat/engine.c	2013/11/26 21:08:12	1.16
@@ -1,4 +1,4 @@
-/* $Id: engine.c,v 1.15 2013/09/07 11:43:49 reyk Exp $	 */
+/* $Id: engine.c,v 1.16 2013/11/26 21:08:12 deraadt Exp $	 */
 /*
  * Copyright (c) 2001, 2007 Can Erkin Acar <canacar@openbsd.org>
  *
@@ -168,7 +168,7 @@
 
 		/* count until we hit a non digit. (e.g. the prefix) */
 		for (digits = 0; digits < len; digits++)
-			if (!isdigit(buf[digits]))
+			if (!isdigit((unsigned char)buf[digits]))
 				break;
 
 		curdigit = digits;