diff --git a/addons/base_calendar/__openerp__.py b/addons/base_calendar/__openerp__.py
index 5688c0e05b5..02e75b5ebef 100644
--- a/addons/base_calendar/__openerp__.py
+++ b/addons/base_calendar/__openerp__.py
@@ -4,8 +4,11 @@
     "depends": ['base'],
     "js": [
         'static/lib/dhtmlxScheduler/codebase/dhtmlxscheduler.js',
+        'static/lib/dhtmlxScheduler/codebase/ext/dhtmlxscheduler_minical.js',
         'static/src/js/calendar.js'
     ],
-    "css": ['static/lib/dhtmlxScheduler/codebase/dhtmlxscheduler.css'],
+    "css": ['static/lib/dhtmlxScheduler/codebase/dhtmlxscheduler.css',
+            'static/lib/dhtmlxScheduler/codebase/ext/dhtmlxscheduler_ext.css'
+            ],
     'active': True
 }