diff --git a/src/tools/copyright.pl b/src/tools/copyright.pl
index 188ac1fc76..bd9f89d6ab 100755
--- a/src/tools/copyright.pl
+++ b/src/tools/copyright.pl
@@ -41,7 +41,7 @@ sub wanted
 
 	# skip file names with binary extensions
 	# How are these updated?  bjm 2012-01-02
-	return if ($_ =~ m/\.(ico|bin|po)$/);
+	return if ($_ =~ m/\.(ico|bin|po|key)$/);
 
 	my @lines;
 	tie @lines, "Tie::File", $File::Find::name;