diff --git a/types.php b/types.php
index 4356dc0..6c55647 100644
--- a/types.php
+++ b/types.php
@@ -26,17 +26,17 @@
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 //control base class
-include 'types/base.php';
+include_once 'types/base.php';
 
 //control types
-include 'types/separator.php';
-include 'types/text.php';
-include 'types/textarea.php';
-include 'types/checkbox.php';
-include 'types/list.php';
-include 'types/note.php';
-include 'types/recaptcha.php';
-include 'types/file.php';
+include_once 'types/separator.php';
+include_once 'types/text.php';
+include_once 'types/textarea.php';
+include_once 'types/checkbox.php';
+include_once 'types/list.php';
+include_once 'types/note.php';
+include_once 'types/recaptcha.php';
+include_once 'types/file.php';
 
 //'panel' helpers
 include 'types/panelhelper.php';