diff --git a/htdocs/core/lib/price.lib.php b/htdocs/core/lib/price.lib.php
index 528abfcd6a5..03eb651e4db 100644
--- a/htdocs/core/lib/price.lib.php
+++ b/htdocs/core/lib/price.lib.php
@@ -93,10 +93,14 @@ function calcul_price_total($qty, $pu, $remise_percent_ligne, $txtva, $uselocalt
 	//dol_syslog("Price.lib::calcul_price_total qty=".$qty." pu=".$pu." remiserpercent_ligne=".$remise_percent_ligne." txtva=".$txtva." uselocaltax1_rate=".$uselocaltax1_rate." uselocaltax2_rate=".$uselocaltax2_rate.' remise_percent_global='.$remise_percent_global.' price_base_type='.$ice_base_type.' type='.$type.' progress='.$progress);
 
 	$countryid=$seller->country_id;
+	
+	if (is_numeric($uselocaltax1_rate)) $uselocaltax1_rate=(float) $uselocaltax1_rate;
+	if (is_numeric($uselocaltax2_rate)) $uselocaltax2_rate=(float) $uselocaltax2_rate;
+	
 	if ($uselocaltax1_rate < 0) $uselocaltax1_rate=$seller->localtax1_assuj;
 	if ($uselocaltax2_rate < 0) $uselocaltax2_rate=$seller->localtax2_assuj;
 
-	dol_syslog('Price.lib::calcul_price_total qty='.$qty.' pu='.$pu.' remise_percent_ligne='.$remise_percent_ligne.' txtva='.$txtva.' uselocaltax1_rate='.$uselocaltax1_rate.' uselocaltax2_rate='.$uselocaltax2_rate.' remise_percent_global='.$remise_percent_global.' price_base_type='.$ice_base_type.' type='.$type.' progress='.$progress);
+	dol_syslog('Price.lib::calcul_price_total qty='.$qty.' pu='.$pu.' remise_percent_ligne='.$remise_percent_ligne.' txtva='.$txtva.' uselocaltax1_rate='.$uselocaltax1_rate.' uselocaltax2_rate='.$uselocaltax2_rate.' remise_percent_global='.$remise_percent_global.' price_base_type='.$price_base_type.' type='.$type.' progress='.$progress);
 
     // Now we search localtaxes information ourself (rates and types).
 	$localtax1_type=0;