diff --git a/htdocs/product/card.php b/htdocs/product/card.php
index f03a6db0e17..406fb970016 100644
--- a/htdocs/product/card.php
+++ b/htdocs/product/card.php
@@ -1598,7 +1598,7 @@ else
 				// TODO change for compatibility with edit in place
 				$typeformat='select;0:'.$langs->trans("Product").',1:'.$langs->trans("Service");
 				print '<tr><td class="titlefield">';
-				print (!empty($conf->global->MAIN_ALLOW_CHANGE_PRODUCT_TYPE)) ? $form->editfieldkey("Type", 'fk_product_type', $object->type, $object, $usercancreate, $typeformat) : $langs->trans('Type');
+				print (empty($conf->global->MAIN_DENY_CHANGE_PRODUCT_TYPE)) ? $form->editfieldkey("Type", 'fk_product_type', $object->type, $object, $usercancreate, $typeformat) : $langs->trans('Type');
 				print '</td><td colspan="2">';
 				print $form->editfieldval("Type", 'fk_product_type', $object->type, $object, $usercancreate, $typeformat);
 				print '</td></tr>';