diff --git a/htdocs/modulebuilder/template/css/mycss.css.php b/htdocs/modulebuilder/template/css/mycss.css.php
deleted file mode 100644
index 60d49d7c0bc..00000000000
--- a/htdocs/modulebuilder/template/css/mycss.css.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-/* <one line to give the program's name and a brief idea of what it does.>
- * Copyright (C) <year>  <name of author>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-/**
- * \file    htdocs/modulebuilder/template/css/mycss.css.php
- * \ingroup mymodule
- * \brief   CSS file for module MyModule.
- */
-
-header('Content-Type: text/css');
diff --git a/htdocs/modulebuilder/template/css/mymodule.css.php b/htdocs/modulebuilder/template/css/mymodule.css.php
new file mode 100644
index 00000000000..0dbfae5b9ef
--- /dev/null
+++ b/htdocs/modulebuilder/template/css/mymodule.css.php
@@ -0,0 +1,66 @@
+<?php
+/* <one line to give the program's name and a brief idea of what it does.>
+ * Copyright (C) <year>  <name of author>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file    htdocs/modulebuilder/template/css/mymodule.css.php
+ * \ingroup mymodule
+ * \brief   CSS file for module MyModule.
+ */
+
+//if (! defined('NOREQUIREUSER')) define('NOREQUIREUSER','1');	// Not disabled because need to load personalized language
+//if (! defined('NOREQUIREDB'))   define('NOREQUIREDB','1');	// Not disabled to increase speed. Language code is found on url.
+if (! defined('NOREQUIRESOC'))    define('NOREQUIRESOC','1');
+//if (! defined('NOREQUIRETRAN')) define('NOREQUIRETRAN','1');	// Not disabled because need to do translations
+if (! defined('NOCSRFCHECK'))     define('NOCSRFCHECK',1);
+if (! defined('NOTOKENRENEWAL'))  define('NOTOKENRENEWAL',1);
+if (! defined('NOLOGIN'))         define('NOLOGIN',1);          // File must be accessed by logon page so without login
+//if (! defined('NOREQUIREMENU'))   define('NOREQUIREMENU',1);  // We need top menu content
+if (! defined('NOREQUIREHTML'))   define('NOREQUIREHTML',1);
+if (! defined('NOREQUIREAJAX'))   define('NOREQUIREAJAX','1');
+
+
+session_cache_limiter(FALSE);
+
+$res=0;
+if (! $res && ! empty($_SERVER["CONTEXT_DOCUMENT_ROOT"])) $res=@include($_SERVER["CONTEXT_DOCUMENT_ROOT"]."/main.inc.php");
+if (! $res && file_exists("../../main.inc.php")) $res=@include("../../main.inc.php");
+if (! $res && file_exists("../../../main.inc.php")) $res=@include("../../../main.inc.php");
+require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';
+
+// Load user to have $user->conf loaded (not done into main because of NOLOGIN constant defined) and load permission if we need to use them in CSS
+/*if (empty($user->id) && ! empty($_SESSION['dol_login']))
+{
+    $user->fetch('',$_SESSION['dol_login']);
+	$user->getrights();
+}*/
+
+
+// Define css type
+header('Content-type: text/css');
+// Important: Following code is to cache this file to avoid page request by browser at each Dolibarr page access.
+// You can use CTRL+F5 to refresh your browser cache.
+if (empty($dolibarr_nocache)) header('Cache-Control: max-age=3600, public, must-revalidate');
+else header('Cache-Control: no-cache');
+
+?>
+
+.myclasscss {
+	/* ... */
+}
+
+