diff --git a/cataloguing/merge_ajax.pl b/cataloguing/merge_ajax.pl
index 6bad3e91d2..26f08003ac 100755
--- a/cataloguing/merge_ajax.pl
+++ b/cataloguing/merge_ajax.pl
@@ -16,7 +16,7 @@ use CGI::Cookie; # need to check cookies before
                  # having CGI parse the POST request
 
 my %cookies = fetch CGI::Cookie;
-my ($auth_status, $sessionID) = check_cookie_auth($cookies{'CGISESSID'}->value, { editcatalogue => '1' });
+my ($auth_status, $sessionID) = check_cookie_auth($cookies{'CGISESSID'}->value, { editcatalogue => 'edit_catalogue' });
 if ($auth_status ne "ok") {
     my $reply = CGI->new("");
     print $reply->header(-type => 'text/html');