===================================================================
RCS file: /cvs/mandoc/mandoc.c,v
retrieving revision 1.26
retrieving revision 1.27
diff -u -p -r1.26 -r1.27
--- mandoc/mandoc.c	2010/07/22 14:03:50	1.26
+++ mandoc/mandoc.c	2010/07/25 19:05:59	1.27
@@ -1,4 +1,4 @@
-/*	$Id: mandoc.c,v 1.26 2010/07/22 14:03:50 kristaps Exp $ */
+/*	$Id: mandoc.c,v 1.27 2010/07/25 19:05:59 joerg Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -337,7 +337,7 @@ mandoc_eos(const char *p, size_t sz, int enclosed)
 			found = 1;
 			break;
 		default:
-			return(found && (!enclosed || isalnum(*q)));
+			return(found && (!enclosed || isalnum((unsigned char)*q)));
 		}
 	}