diff --git a/htdocs/core/class/commondocgenerator.class.php b/htdocs/core/class/commondocgenerator.class.php
index 5c129cb0803..28f8634dea6 100644
--- a/htdocs/core/class/commondocgenerator.class.php
+++ b/htdocs/core/class/commondocgenerator.class.php
@@ -397,7 +397,7 @@ abstract class CommonDocGenerator
 		$array_key.'_payment_term_code'=>$object->cond_reglement_code,
 		$array_key.'_payment_term'=>($outputlangs->transnoentitiesnoconv('PaymentCondition'.$object->cond_reglement_code) != 'PaymentCondition'.$object->cond_reglement_code ? $outputlangs->transnoentitiesnoconv('PaymentCondition'.$object->cond_reglement_code) : ($object->cond_reglement_doc ? $object->cond_reglement_doc : $object->cond_reglement)),
 
-        $array_key.'_incoterms'=>$object->display_incoterms(),
+        $array_key.'_incoterms'=>(method_exists($object, 'display_incoterms') ? $object->display_incoterms() : ''),
 
 		$array_key.'_bank_iban'=>$bank_account->iban,
 		$array_key.'_bank_bic'=>$bank_account->bic,