diff --git a/menu_token.module b/menu_token.module
index 1907fd4..bee2bc2 100644
--- a/menu_token.module
+++ b/menu_token.module
@@ -183,7 +183,9 @@ function menu_token_menu_link_alter(&$item) {
 function _menu_token_is_called_from_features() {
   $called = &drupal_static(__FUNCTION__);
   if (!isset($called)) {
-    $callstack = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
+    // Save memory in the debug_backtrace() function when possible
+    $options = (version_compare(PHP_VERSION, '5.3.6', '>=') ? DEBUG_BACKTRACE_IGNORE_ARGS : NULL);
+    $callstack = debug_backtrace($options);
     foreach($callstack as $function) {
       $called = ($function['function'] == 'menu_links_features_export_render');
       if ($called) {