diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 08b0254cc10..97083e95f96 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -13786,6 +13786,7 @@ function getElementProperties($elementType)
 		$classpath = 'supplier_proposal/class';
 		$module = 'supplier_proposal';
 		$classfile = 'supplier_proposal';
+		$classname = 'SupplierProposalLine';
 		$table_element = 'supplier_proposaldet';
 		$parent_element = 'supplier_proposal';
 	} elseif ($elementType == 'contract') {