diff --git a/ja_JP.eucJP/htdocs/ports/portindex b/ja_JP.eucJP/htdocs/ports/portindex
index 5520fac69e..bcc99ad394 100755
--- a/ja_JP.eucJP/htdocs/ports/portindex
+++ b/ja_JP.eucJP/htdocs/ports/portindex
@@ -6,7 +6,7 @@
 # Mon May 13 10:31:58 EST 1996
 # $FreeBSD$
 # The FreeBSD Japanese Documentation Project
-# Original revision: r49825
+# Original revision: r50931
 
 ############################################################
 
@@ -307,7 +307,13 @@ EOF
 	print $moutf "<h3>",$category_groups{$cg},"</h3>\n";
 	print $moutf "<ul>\n";
 	foreach my $key (sort(keys(%stats))) {
+	    if (!defined $category_description{$key}{group}) {
+		warn "Warning: no category_description/group for $key, ignore\n";
+		next;
+	    }
+
 	    next if ($category_description{$key}{group} ne $cg);
+
 	    # For the master file...
 	    print $moutf 
 		"<li><a href=\"$key.html\">\u$key</a> <em>($stats{$key})</em>";