diff --git a/htdocs/comm/action/class/actioncomm.class.php b/htdocs/comm/action/class/actioncomm.class.php
index 97d3c4e397e..442e1b8bdd9 100644
--- a/htdocs/comm/action/class/actioncomm.class.php
+++ b/htdocs/comm/action/class/actioncomm.class.php
@@ -294,6 +294,11 @@ class ActionComm extends CommonObject
      */
     public $icalcolor;
 
+    /**
+     * @var string Extraparam
+     */
+    public $extraparams;
+
     /**
      * @var array Actions
      */