diff --git a/themes/prestashop/js/product.js b/themes/prestashop/js/product.js
index 9fde23617..19d67ceae 100644
--- a/themes/prestashop/js/product.js
+++ b/themes/prestashop/js/product.js
@@ -347,13 +347,14 @@ function updateDisplay()
 		var reduction = 0;
 		if (selectedCombination['specific_price'].reduction_price || selectedCombination['specific_price'].reduction_percent)
 		{
-            reduction_price = (specific_currency ? reduction_price : reduction_price * currencyRate);
-			reduction = productPrice * (parseFloat(reduction_percent) / 100) + reduction_price;
-			if (reduction_price && (displayPrice || noTaxForThisProduct))
+			selectedCombination['specific_price'].reduction_price = (specific_currency ? selectedCombination['specific_price'].reduction_price : selectedCombination['specific_price'].reduction_price * currencyRate);
+			reduction = productPrice * (parseFloat(selectedCombination['specific_price'].reduction_percent) / 100) + selectedCombination['specific_price'].reduction_price;
+			if (selectedCombination['specific_price'].reduction_price && (displayPrice || noTaxForThisProduct))
 				reduction = ps_round(reduction / tax, 6);
 		}
 		else if (product_specific_price.reduction_price || product_specific_price.reduction_percent)
 		{
+			product_specific_price.reduction_price = (specific_currency ? product_specific_price.reduction_price : product_specific_price.reduction_price * currencyRate);
 			reduction = productPrice * (parseFloat(product_specific_price.reduction_percent) / 100) + product_specific_price.reduction_price;
 			if (product_specific_price.reduction_price && (displayPrice || noTaxForThisProduct))
 				reduction = ps_round(reduction / tax, 6);