diff --git a/includes/common.php b/includes/common.php
index 484df8d96b..b074218cd4 100644
--- a/includes/common.php
+++ b/includes/common.php
@@ -1503,10 +1503,8 @@ function clean($value)
  */
 function display($value)
 {
-    global $config;
-    $p_config = HTMLPurifier_Config::createDefault();
-    $p_config->set('Cache.SerializerPath', $config['temp_dir']);
-    $purifier = new HTMLPurifier($p_config);
+    /** @var HTMLPurifier $purifier */
+    global $purifier;
     return $purifier->purify(stripslashes($value));
 }
 
diff --git a/includes/init.php b/includes/init.php
index 8df327028c..3ae3cc1ea5 100644
--- a/includes/init.php
+++ b/includes/init.php
@@ -135,6 +135,11 @@ if (module_selected('web', $init_modules)) {
         $os_list[] = $config['install_dir'].'/includes/definitions/'. $v['os'] . '.yaml';
     }
     load_all_os($os_list);
+
+    // initialize HTML Purifier
+    $p_config = HTMLPurifier_Config::createDefault();
+    $p_config->set('Cache.SerializerPath', $config['temp_dir']);
+    $purifier = new HTMLPurifier($p_config);
 }
 
 $console_color = new Console_Color2();