diff --git a/index.php b/index.php
index 0ceeb3a3..a587cf40 100644
--- a/index.php
+++ b/index.php
@@ -1121,6 +1121,8 @@ function print_add_ticket()
                                 <input type="hidden" id="latitude" name="latitude" value="E-0">
                                 <input type="hidden" id="longitude" name="longitude" value="E-0">
                                 <input type="hidden" name="token" value="<?php hesk_token_echo(); ?>">
+                                <input type="hidden" id="screen-resolution-height" name="screen_resolution_height">
+                                <input type="hidden" id="screen-resolution-width" name="screen_resolution_width">
                                 <input type="submit" value="<?php echo $hesklang['sub_ticket']; ?>"
                                        class="btn btn-default">
                             </div>
diff --git a/submit_ticket.php b/submit_ticket.php
index d064f2dd..e069cd41 100644
--- a/submit_ticket.php
+++ b/submit_ticket.php
@@ -364,8 +364,8 @@ $tmpvar['longitude'] = hesk_POST('longitude');
 $tmpvar['html'] = $modsForHesk_settings['rich_text_for_tickets_for_customers'];
 
 // Set screen res and user agent
-$tmpvar['screen_resolution_height'] = hesk_POST('screen_resolution_height');
-$tmpvar['screen_resolution_width'] = hesk_POST('screen_resolution_width');
+$tmpvar['screen_resolution_height'] = hesk_POST('screen_resolution_height', NULL);
+$tmpvar['screen_resolution_width'] = hesk_POST('screen_resolution_width', NULL);
 $tmpvar['user_agent'] = $_SERVER['HTTP_USER_AGENT'];
 
 // Should the helpdesk validate emails?