diff --git a/calendar/inc/class.calendar_bo.inc.php b/calendar/inc/class.calendar_bo.inc.php
index d7de3e645e..f3e7325794 100644
--- a/calendar/inc/class.calendar_bo.inc.php
+++ b/calendar/inc/class.calendar_bo.inc.php
@@ -1738,6 +1738,18 @@ class calendar_bo
 		return $result;
 	}
 
+	/**
+	 * Check access to the projects file store
+	 *
+	 * @param int $id id of entry
+	 * @param int $check EGW_ACL_READ for read and EGW_ACL_EDIT for write or delete access
+	 * @return boolean true if access is granted or false otherwise
+	 */
+	function file_access($id,$check,$rel_path)
+	{
+		return $this->check_perms($check,$id);
+	}
+
 	/**
 	 * sets the default prefs, if they are not already set (on a per pref. basis)
 	 *
diff --git a/calendar/inc/class.calendar_hooks.inc.php b/calendar/inc/class.calendar_hooks.inc.php
index 0f259c3deb..751f21acd8 100644
--- a/calendar/inc/class.calendar_hooks.inc.php
+++ b/calendar/inc/class.calendar_hooks.inc.php
@@ -37,6 +37,7 @@ class calendar_hooks
 			'add_app'    => 'link_app',
 			'add_id'     => 'link_id',
 			'add_popup'  => '750x400',
+			'file_access' => 'calendar.calendar_bo.file_access',
 		);
 	}