diff --git a/include/ac_common.php b/include/ac_common.php
index 17c6c18c7..1ab251bb4 100644
--- a/include/ac_common.php
+++ b/include/ac_common.php
@@ -255,6 +255,7 @@ function isDate($p_date)
 
 function html_page_start($p_theme="", $p_script="", $p_script2="")
 {
+    require_once 'class_html_input.php';
     // check not called twiced
     static  $already_call=0;
     if ( $already_call==1)return;