diff --git a/src/Template/Template.php b/src/Template/Template.php
index 5473c9e..4d2709e 100644
--- a/src/Template/Template.php
+++ b/src/Template/Template.php
@@ -361,7 +361,7 @@ public function escape($string, $functions = null)
         static $flags;
 
         if (!isset($flags)) {
-            $flags = ENT_QUOTES | (defined('ENT_SUBSTITUTE') ? ENT_SUBSTITUTE : 0);
+            $flags = ENT_QUOTES | ENT_SUBSTITUTE;
         }
 
         if ($functions) {