diff --git a/htdocs/product/admin/product_tools.php b/htdocs/product/admin/product_tools.php
index cfbedbcb7f1..d68b395d5ad 100644
--- a/htdocs/product/admin/product_tools.php
+++ b/htdocs/product/admin/product_tools.php
@@ -135,7 +135,7 @@ if ($action == 'convert')
 							$newlevel=$level;
 
 							//print "$objectstatic->id $newprice, $price_base_type, $newvat, $newminprice, $newlevel, $newnpr<br>\n";
-							$retm=$objectstatic->updatePrice($newprice, $price_base_type, $user, $newvatratclean, $newminprice, $newlevel, $newnpr, 0, 0, $localtaxes_type, $newdefaultvatcode);
+							$retm=$objectstatic->updatePrice($newprice, $price_base_type, $user, $newvatrateclean, $newminprice, $newlevel, $newnpr, 0, 0, $localtaxes_type, $newdefaultvatcode);
 							if ($retm < 0)
 							{
 								$error++;
diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index d00cba86e6a..e59b52be803 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -1859,6 +1859,9 @@ class Product extends CommonObject
         if (empty($newnpr)) {
             $newnpr=0;
         }
+        if (empty($newminprice)) {
+        	$newminprice=0;
+        }
 
         // Check parameters
         if ($newvat == '') {