$NetBSD$

--- libfsimage/iso9660/fsys_iso9660.c.orig	2008-01-31 10:06:54.000000000 +0000
+++ libfsimage/iso9660/fsys_iso9660.c	2008-03-01 11:52:29.000000000 +0000
@@ -164,7 +164,7 @@ iso9660_dir (fsi_file_t *ffi, char *dirn
       /* pathlen = strcspn(dirname, "/\n\t "); */
       for (pathlen = 0 ;
 	   dirname[pathlen]
-	     && !isspace(dirname[pathlen]) && dirname[pathlen] != '/' ;
+	     && !isspace((uint8_t)dirname[pathlen]) && dirname[pathlen] != '/' ;
 	   pathlen++)
 	;
 
