diff --git a/htdocs/accountancy/bookkeeping/card.php b/htdocs/accountancy/bookkeeping/card.php
index f4212e2702e..21077dececd 100644
--- a/htdocs/accountancy/bookkeeping/card.php
+++ b/htdocs/accountancy/bookkeeping/card.php
@@ -685,7 +685,7 @@ if ($action == 'create')
 					// It does not use the setup of "key pressed" to select a thirdparty and this hang browser on large databases.
 					// Also, it is not possible to use a value that is not in the list.
 					// Also, the label is not automatically filled when a value is selected.
-					if (empty($conf->global->ACCOUNTANCY_COMBO_FOR_AUX)) {
+					if (!empty($conf->global->ACCOUNTANCY_COMBO_FOR_AUX)) {
 						print $formaccounting->select_auxaccount('', 'subledger_account', 1);
 					} else {
 						print '<input type="text" class="maxwidth150" name="subledger_account" value="">';