diff --git a/htdocs/supplier_proposal/class/supplier_proposal.class.php b/htdocs/supplier_proposal/class/supplier_proposal.class.php
index 7a1e10eed3f..b022c76d0d8 100644
--- a/htdocs/supplier_proposal/class/supplier_proposal.class.php
+++ b/htdocs/supplier_proposal/class/supplier_proposal.class.php
@@ -1006,7 +1006,7 @@ class SupplierProposal extends CommonObject
 							$fk_parent_line,
 							$this->lines[$i]->fk_fournprice,
 							$this->lines[$i]->pa_ht,
-							$this->lines[$i]->label,
+							empty($this->lines[$i]->label) ? '' : $this->lines[$i]->label,		// deprecated
 							$this->lines[$i]->array_options,
 							$this->lines[$i]->ref_fourn,
 							$this->lines[$i]->fk_unit,