diff --git a/htdocs/product/dynamic_price/class/price_parser.class.php b/htdocs/product/dynamic_price/class/price_parser.class.php
index 1dd98c6610e..9ab7285f8f7 100644
--- a/htdocs/product/dynamic_price/class/price_parser.class.php
+++ b/htdocs/product/dynamic_price/class/price_parser.class.php
@@ -104,7 +104,7 @@ class PriceParser
 		{
 			return $langs->trans("ErrorPriceExpression".$code);
 		}
-		else if (in_array($code, array(1, 2, 3, 4, 5, 8, 10, 11, 17, 21, 22))) //Errors which have 1 arg
+		else if (in_array($code, array(1, 2, 3, 4, 5, 8, 10, 11, 17, 21, 22, 24))) //Errors which have 1 arg
 		{
 			return $langs->trans("ErrorPriceExpression".$code, $info);
 		}