diff --git a/ja/ports/portindex b/ja/ports/portindex
index 7542288b37..e06918f20e 100755
--- a/ja/ports/portindex
+++ b/ja/ports/portindex
@@ -4,7 +4,7 @@
 #
 # by John Fieber <jfieber@freebsd.org>
 # Mon May 13 10:31:58 EST 1996
-# $Id: portindex,v 1.10 1998-09-21 15:40:08 motoyuki Exp $
+# $Id: portindex,v 1.11 1998-09-30 16:35:17 wosch Exp $
 # The FreeBSD Japanese Documentation Project
 # Original revision: 1.18
 
@@ -192,8 +192,12 @@ sub main {
 	}
 
     	# Add an entry to the master index
+
+	# workaround for SGML bug, `--' is not allowed in comments
+	local($sname) = $name; 
+	$sname =~ s/--/-=/g;
     	$master[$portnumber] = 
-    	    "<STRONG><A HREF=\"$cat[0].html#$name\">$name</A></STRONG> " .
+    	    "<!-- $sname --><STRONG><A HREF=\"$cat[0].html#$name\">$name</A></STRONG> " .
     	    " -- <EM>$desc</EM><BR>\n";
 	$portnumber++;
     }