diff --git a/top_n b/top_n
index 1630e63..8b27b40 100755
--- a/top_n
+++ b/top_n
@@ -23,7 +23,7 @@ for my $i (0 .. $#data) {
     unless ($top_n{$data[$i][$f]}) {
 	my $val = $data[$i][$v];
 	$data[$i][$v] = 0; 
-	$data[$i][$f] = 'UNKNOWN';
+	$data[$i][$f] = 'OTHER';
 	my $k = join("\t", @{$data[$i]});
 	if (defined($index{$k})) {
 	    $data[$index{$k}][$v] += $val;