diff --git a/htdocs/holiday/class/holiday.class.php b/htdocs/holiday/class/holiday.class.php
index 843dd141a40..a661211b242 100644
--- a/htdocs/holiday/class/holiday.class.php
+++ b/htdocs/holiday/class/holiday.class.php
@@ -899,7 +899,7 @@ class Holiday extends CommonObject
 			$balance = $this->getCPforUser($this->fk_user, $this->fk_type);
 
 			$days = num_between_day($this->date_debut, $this->date_fin);
-			if ($balance - $days < 0 && !getDolGlobalString('HOLIDAY_ALLOW_NEGATIVE_BALANCE')) {
+			if ($balance - $days < 0 && getDolGlobalString('HOLIDAY_DISALLOW_NEGATIVE_BALANCE')) {
 				$this->error = 'LeaveRequestCreationBlockedBecauseBalanceIsNegative';
 				return -1;
 			}