diff --git a/overlay/etc/templates/constants.local.php.tmpl b/overlay/etc/templates/constants.local.php.tmpl
index ac25c40..7e45caf 100644
--- a/overlay/etc/templates/constants.local.php.tmpl
+++ b/overlay/etc/templates/constants.local.php.tmpl
@@ -1,21 +1,15 @@
 <?php
-function safe_define($name, $value) {
-    if (!defined($name)) {
-        return define($name, $value);
-    }
-}
+define('FRESHRSS_USERAGENT', 'FreshRSS/' . FRESHRSS_VERSION . ' (' . PHP_OS . '; ' . FRESHRSS_WEBSITE . ')');
+define('PHP_COMPRESSION', false);
+define('COPY_SYSLOG_TO_STDERR', true);
+define('MAX_LOG_SIZE', 1048576);
+define('DATA_PATH', FRESHRSS_PATH . '/data');
 
-safe_define('FRESHRSS_USERAGENT', 'FreshRSS/' . FRESHRSS_VERSION . ' (' . PHP_OS . '; ' . FRESHRSS_WEBSITE . ')');
-safe_define('PHP_COMPRESSION', false);
-safe_define('COPY_SYSLOG_TO_STDERR', true);
-safe_define('MAX_LOG_SIZE', 1048576);
-safe_define('DATA_PATH', FRESHRSS_PATH . '/data');
-
-safe_define('UPDATE_FILENAME', DATA_PATH . '/update.php');
-safe_define('USERS_PATH', DATA_PATH . '/users');
-safe_define('ADMIN_LOG', USERS_PATH . '/_/log.txt');
-safe_define('API_LOG', USERS_PATH . '/_/log_api.txt');
-safe_define('CACHE_PATH', DATA_PATH . '/cache');
-safe_define('PSHB_LOG', USERS_PATH . '/_/log_pshb.txt');
-safe_define('PSHB_PATH', DATA_PATH . '/PubSubHubbub');
-safe_define('TMP_PATH', CACHE_PATH);
+define('UPDATE_FILENAME', DATA_PATH . '/update.php');
+define('USERS_PATH', DATA_PATH . '/users');
+define('ADMIN_LOG', USERS_PATH . '/_/log.txt');
+define('API_LOG', USERS_PATH . '/_/log_api.txt');
+define('CACHE_PATH', DATA_PATH . '/cache');
+define('PSHB_LOG', USERS_PATH . '/_/log_pshb.txt');
+define('PSHB_PATH', DATA_PATH . '/PubSubHubbub');
+define('TMP_PATH', CACHE_PATH);