diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 6332e655f80..05d9110dbb1 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -7748,7 +7748,7 @@ function price2num($amount, $rounding = '', $option = 0)
 		} elseif ($rounding == 'MT') {
 			$nbofdectoround = getDolGlobalInt('MAIN_MAX_DECIMALS_TOT');		// usually 2 or 3
 		} elseif ($rounding == 'MS') {
-			$nbofdectoround = isset($conf->global->MAIN_MAX_DECIMALS_STOCK) ? getDolGlobalInt('MAIN_MAX_DECIMALS_STOCK') : 5;
+			$nbofdectoround = getDolGlobalInt('MAIN_MAX_DECIMALS_STOCK', 5);
 		} elseif ($rounding == 'CU') {
 			$nbofdectoround = getDolGlobalInt('MAIN_MAX_DECIMALS_CURRENCY_UNIT', getDolGlobalInt('MAIN_MAX_DECIMALS_UNIT'));	// TODO Use param of currency
 		} elseif ($rounding == 'CT') {