diff --git a/config/zentaopms.php b/config/zentaopms.php
index 0fbc294f6b..fe193d98ca 100644
--- a/config/zentaopms.php
+++ b/config/zentaopms.php
@@ -98,8 +98,8 @@ $config->hourPointCommonList['vi'][0] = 'giờ';
 $config->hourPointCommonList['vi'][1] = 'điểm';
 $config->hourPointCommonList['vi'][2] = 'function point';
 
-$config->manualUrl['home'] = 'https://www.zentao.net/book/zentaopmshelp.html?fullScreen=zentao&theme=' . $_COOKIE['theme'];
-$config->manualUrl['int']  = 'https://www.zentao.pm/book/zentaomanual/zentao-installation-11.html?fullScreen=zentao&theme=' . $_COOKIE['theme'];
+$config->manualUrl['home'] = 'https://www.zentao.net/book/zentaopmshelp.html?fullScreen=zentao';
+$config->manualUrl['int']  = 'https://www.zentao.pm/book/zentaomanual/zentao-installation-11.html?fullScreen=zentao';
 
 /* Supported charsets. */
 $config->charsets['zh-cn']['utf-8'] = 'UTF-8';
diff --git a/module/common/model.php b/module/common/model.php
index 7906e05691..d33a76a6fb 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -356,7 +356,7 @@ class commonModel extends model
         echo "<ul class='dropdown-menu pull-left'>";
         //if($config->global->flow == 'full' && !commonModel::isTutorialMode() and $app->user->account != 'guest') echo '<li>' . html::a(helper::createLink('tutorial', 'start'), $lang->noviceTutorial, '', "class='iframe' data-class-name='modal-inverse' data-width='800' data-headerless='true' data-backdrop='true' data-keyboard='true'") . "</li>";
 
-        $manualUrl = (!empty($config->isINT)) ? $config->manualUrl['int'] : $config->manualUrl['home'];
+        $manualUrl = ((!empty($config->isINT)) ? $config->manualUrl['int'] : $config->manualUrl['home']) . '&theme=' . $_COOKIE['theme'];
         echo '<li>' . html::a($manualUrl, $lang->manual, '', "class='open-in-app' id='helpLink' data-app='help'") . '</li>';
 
         echo '<li>' . html::a(helper::createLink('misc', 'changeLog'), $lang->changeLog, '', "class='iframe' data-width='800' data-headerless='true' data-backdrop='true' data-keyboard='true'") . '</li>';