diff --git a/htdocs/bom/class/bom.class.php b/htdocs/bom/class/bom.class.php
index 866c8be0857..02207be5265 100644
--- a/htdocs/bom/class/bom.class.php
+++ b/htdocs/bom/class/bom.class.php
@@ -25,9 +25,13 @@
 
 // Put here all includes required by your class file
 require_once DOL_DOCUMENT_ROOT.'/core/class/commonobject.class.php';
-require_once DOL_DOCUMENT_ROOT."/core/class/commonobjectline.class.php";
-require_once DOL_DOCUMENT_ROOT.'/workstation/class/workstation.class.php';
+require_once DOL_DOCUMENT_ROOT.'/core/class/commonobjectline.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
+
+if (isModEnabled('workstation')) {
+	require_once DOL_DOCUMENT_ROOT.'/workstation/class/workstation.class.php';
+}
+
 //require_once DOL_DOCUMENT_ROOT . '/societe/class/societe.class.php';
 //require_once DOL_DOCUMENT_ROOT . '/product/class/product.class.php';