diff --git a/public_html/lists/admin/lib.php b/public_html/lists/admin/lib.php
index 910bb5ce8..c1d705b24 100644
--- a/public_html/lists/admin/lib.php
+++ b/public_html/lists/admin/lib.php
@@ -959,7 +959,9 @@ function getPageLock($force = 0)
                 cl_output($GLOBALS['I18N']->get('Running commandline, quitting. We\'ll find out what to do in the next run.'));
                 exit;
             }
-            output($GLOBALS['I18N']->get('Sleeping for 20 seconds, aborting will quit'), 0);
+            if (function_exists('output')) {
+                output($GLOBALS['I18N']->get('Sleeping for 20 seconds, aborting will quit'), 0);
+            }
             flush();
             $abort = ignore_user_abort(0);
             sleep(20);
@@ -967,9 +969,9 @@ function getPageLock($force = 0)
         ++$waited;
         if ($waited > 10) {
             // we have waited 10 cycles, abort and quit script
-            output($GLOBALS['I18N']->get('We have been waiting too long, I guess the other process is still going ok'),
-                0);
-
+            if (function_exists('output')) {
+                output($GLOBALS['I18N']->get('We have been waiting too long, I guess the other process is still going ok'), 0);
+            }
             return false;
         }
         $running_req = Sql_query('select now() - modified,id from '.$tables['sendprocess']." where page = \"$thispage\" and alive order by started desc");