diff --git a/admin-dev/themes/default/template/controllers/cart_rules/actions.tpl b/admin-dev/themes/default/template/controllers/cart_rules/actions.tpl
index cf4c39b79..bce3cfe7a 100644
--- a/admin-dev/themes/default/template/controllers/cart_rules/actions.tpl
+++ b/admin-dev/themes/default/template/controllers/cart_rules/actions.tpl
@@ -30,7 +30,7 @@
 <div id="apply_discount_amount_div">
 	<label>{l s='Amount'}</label>
 	<div class="margin-form">
-		<input type="text" id="reduction_amount" name="reduction_amount" value="{$currentTab->getFieldValue($currentObject, 'reduction_amount')|floatval}" />
+		<input type="text" id="reduction_amount" name="reduction_amount" value="{$currentTab->getFieldValue($currentObject, 'reduction_amount')|floatval}" onchange="this.value = this.value.replace(/,/g, '.');" />
 		<select name="reduction_currency">
 		{foreach from=$currencies item='currency'}
 			<option value="{$currency.id_currency|intval}" {if $currentTab->getFieldValue($currentObject, 'reduction_currency') == $currency.id_currency || (!$currentTab->getFieldValue($currentObject, 'reduction_currency') && $currency.id_currency == $defaultCurrency)}selected="selected"{/if}>{$currency.iso_code}</option>