diff --git a/util/merge_copyrights b/util/merge_copyrights
index b216257bd9..a5d01b784b 100644
--- a/util/merge_copyrights
+++ b/util/merge_copyrights
@@ -88,6 +88,8 @@ while (<CHANGES>) {
 	    $file_types{$_} = "SGML";
 	} elsif ($base =~ /doc\/arm\/.*\.html$/) {
 	    $file_types{$_} = "X";
+	} elsif ($base =~ /\.(sty|pdf|eps)$/) {
+	    $file_types{$_} = "X";
 	} elsif ($base =~ /\.html$/) {
 	    $file_types{$_} = "HTML";
 	} elsif ($base =~ /\.(man|[0-9])$/) {