diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 6f09b27e53c..1e58f11aeb0 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -4905,7 +4905,7 @@ class Facture extends CommonInvoice
 
 	/**
 	 * @param	int			$rounding		Minimum number of decimal to show. If 0, no change, if -1, we use min($conf->global->MAIN_MAX_DECIMALS_UNIT,$conf->global->MAIN_MAX_DECIMALS_TOT)
-	 * @return number or -1 if not available
+	 * @return float or -1 if not available
 	 */
 	public function getRetainedWarrantyAmount($rounding = -1)
 	{