diff --git a/util/merge_copyrights b/util/merge_copyrights
index 585a6010f8..bfc950c73b 100644
--- a/util/merge_copyrights
+++ b/util/merge_copyrights
@@ -99,7 +99,7 @@ while (<CHANGES>) {
 	    $file_types{$_} = "CONF-SH";
 	} elsif ($base =~ /\.(db|hint)$/) {
 	    $file_types{$_} = "ZONE";
-	} elsif ($base =~ /\.mkd$/) {
+	} elsif ($base =~ /\.md$/) {
 	    $file_types{$_} = "MKD";
 	} elsif ($base =~ /(\/\.(gitignore|gitattributes)|Atffile|\.(gif|jpg))$/i) {
 	    $file_types{$_} = "X";