diff --git a/webui/controller/message/bulkrestore.php b/webui/controller/message/bulkrestore.php
index 60a9758..21397f1 100644
--- a/webui/controller/message/bulkrestore.php
+++ b/webui/controller/message/bulkrestore.php
@@ -1,6 +1,6 @@
 <?php
 
-require DIR_SYSTEM . 'helper/mime.php';
+require_once DIR_SYSTEM . 'helper/mime.php';
 
 class ControllerMessageBulkrestore extends Controller {
 
diff --git a/webui/controller/message/restore.php b/webui/controller/message/restore.php
index 74b9f1e..d64a097 100644
--- a/webui/controller/message/restore.php
+++ b/webui/controller/message/restore.php
@@ -1,6 +1,6 @@
 <?php
 
-require DIR_SYSTEM . 'helper/mime.php';
+require_once DIR_SYSTEM . 'helper/mime.php';
 
 class ControllerMessageRestore extends Controller {
 
diff --git a/webui/model/message/restore.php b/webui/model/message/restore.php
index 86a77c9..fc5734d 100644
--- a/webui/model/message/restore.php
+++ b/webui/model/message/restore.php
@@ -1,6 +1,6 @@
 <?php
 
-require DIR_SYSTEM . 'helper/mime.php';
+require_once DIR_SYSTEM . 'helper/mime.php';
 
 class ModelMessageRestore extends Model {
 
diff --git a/webui/model/search/message.php b/webui/model/search/message.php
index 8b7944a..c7b06ec 100644
--- a/webui/model/search/message.php
+++ b/webui/model/search/message.php
@@ -1,6 +1,6 @@
 <?php
 
-require DIR_SYSTEM . 'helper/mime.php';
+require_once DIR_SYSTEM . 'helper/mime.php';
 
 
 class ModelSearchMessage extends Model {