diff --git a/app/Core/Helper.php b/app/Core/Helper.php
index 1dea832a0..013bf0f28 100644
--- a/app/Core/Helper.php
+++ b/app/Core/Helper.php
@@ -502,7 +502,7 @@ class Helper
     public function markdown($text, array $link = array())
     {
         $parser = new Markdown($link, $this);
-        $parser->setMarkupEscaped(MARKDOWN_ESCAPED);
+        $parser->setMarkupEscaped(MARKDOWN_ESCAPE_HTML);
         return $parser->text($text);
     }
 
diff --git a/app/constants.php b/app/constants.php
index 8c23da81d..08759cbd1 100644
--- a/app/constants.php
+++ b/app/constants.php
@@ -75,4 +75,4 @@ defined('ENABLE_XFRAME') or define('ENABLE_XFRAME', true);
 defined('FILES_DIR') or define('FILES_DIR', 'data/files/');
 
 // Escape html inside markdown text
-define('MARKDOWN_ESCAPED', true);
+defined('MARKDOWN_ESCAPE_HTML') or define('MARKDOWN_ESCAPE_HTML', true);
diff --git a/config.default.php b/config.default.php
index 0306ea35c..92b61bde5 100644
--- a/config.default.php
+++ b/config.default.php
@@ -1,5 +1,7 @@
 <?php
 
+// Rename this file to config.php if you want to change the values
+
 // Enable/Disable debug
 define('DEBUG', false);
 
@@ -129,4 +131,4 @@ define('ENABLE_HSTS', true);
 define('ENABLE_XFRAME', true);
 
 // Escape html inside markdown text
-define('MARKDOWN_ESCAPED', true);
+define('MARKDOWN_ESCAPE_HTML', true);