diff --git a/htdocs/resource/class/dolresource.class.php b/htdocs/resource/class/dolresource.class.php
index 3e1a2615cd9..bcd97493ac7 100644
--- a/htdocs/resource/class/dolresource.class.php
+++ b/htdocs/resource/class/dolresource.class.php
@@ -51,6 +51,11 @@ class Dolresource extends CommonObject
 	public $busy;
 	public $mandatory;
 
+	/**
+	 * @var integer
+	 */
+	public $socid;
+
 	/**
 	 * @var int ID
 	 */