diff --git a/bin/ngcp-fraud-auto-lock b/bin/ngcp-fraud-auto-lock
index de498ab..b13270a 100755
--- a/bin/ngcp-fraud-auto-lock
+++ b/bin/ngcp-fraud-auto-lock
@@ -182,7 +182,7 @@ sub main {
                                    $event->{id}),
                                    'subscribers');
         $event->{interval} = 'month';
-        if ($event->{interval_lock} > 0) {
+        if (defined $event->{interval_lock} && $event->{interval_lock} > 0) {
             lock_customer($event, $subscribers);
         }
         eval {
@@ -203,6 +203,10 @@ __END__
 
 ngcp-fraud-auto-lock - checks for contract balances above fraud limit thresholds
 
+=head1 SYNOPSIS
+
+ngcp-fraud-daily-lock
+
 =head1 OPTIONS
 
 =over 8
@@ -259,10 +263,12 @@ Development Team <support@sipwise.com>.
 
 Kirill Solomko <ksolomko@sipwise.com>
 
-=head1 LICENSE AND COPYRIGHT
+=head1 COPYRIGHT
 
 Copyright (C) 2016 Sipwise GmbH, Austria
 
+=head1 LICENSE
+
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
diff --git a/bin/ngcp-fraud-daily-lock b/bin/ngcp-fraud-daily-lock
index cdb33be..2d73f2d 100755
--- a/bin/ngcp-fraud-daily-lock
+++ b/bin/ngcp-fraud-daily-lock
@@ -182,7 +182,7 @@ sub main {
                                    $event->{id}),
                                    'subscribers');
         $event->{interval} = 'day';
-        if ($event->{interval_lock} > 0) {
+        if (defined $event->{interval_lock} && $event->{interval_lock} > 0) {
             lock_customer($event, $subscribers);
         }
         eval {
@@ -203,6 +203,10 @@ __END__
 
 ngcp-fraud-daily-lock - checks for contract balances above fraud limit thresholds
 
+=head1 SYNOPSIS
+
+ngcp-fraud-daily-lock
+
 =head1 OPTIONS
 
 =over 8
@@ -259,10 +263,12 @@ Development Team <support@sipwise.com>.
 
 Kirill Solomko <ksolomko@sipwise.com>
 
-=head1 LICENSE AND COPYRIGHT
+=head1 COPYRIGHT
 
 Copyright (C) 2016 Sipwise GmbH, Austria
 
+=head1 LICENSE
+
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or