diff --git a/htdocs/contrat/fiche.php b/htdocs/contrat/fiche.php
index 4474f56ea05e89480814b4714b348cfe1795b073..e675bb3e33e22bf77d1fd1270c5121097f5b0b80 100644
--- a/htdocs/contrat/fiche.php
+++ b/htdocs/contrat/fiche.php
@@ -31,7 +31,7 @@ require_once(DOL_DOCUMENT_ROOT."/core/lib/price.lib.php");
 require_once(DOL_DOCUMENT_ROOT.'/core/lib/contract.lib.php');
 require_once(DOL_DOCUMENT_ROOT."/contrat/class/contrat.class.php");
 require_once(DOL_DOCUMENT_ROOT."/core/modules/contract/modules_contract.php");
-if ($conf->produit->enabled)  require_once(DOL_DOCUMENT_ROOT."/product/class/product.class.php");
+if ($conf->produit->enabled || $conf->service->enabled)  require_once(DOL_DOCUMENT_ROOT."/product/class/product.class.php");
 if ($conf->projet->enabled)  require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
 if ($conf->propal->enabled)  require_once(DOL_DOCUMENT_ROOT."/comm/propal/class/propal.class.php");
 if ($conf->projet->enabled)  require_once(DOL_DOCUMENT_ROOT."/core/lib/project.lib.php");