diff --git a/htdocs/admin/multicurrency.php b/htdocs/admin/multicurrency.php
index 0229f4fc150..ce6a04fab30 100644
--- a/htdocs/admin/multicurrency.php
+++ b/htdocs/admin/multicurrency.php
@@ -78,34 +78,54 @@ if (preg_match('/del_(.*)/',$action,$reg))
 
 if ($action == 'add_currency')
 {
+	$error=0;
+
 	$langs->loadCacheCurrencies('');
 
 	$code = GETPOST('code', 'alpha');
-	$rate = GETPOST('rate', 'alpha');
+	$rate = price2num(GETPOST('rate', 'alpha'));
 	$currency = new MultiCurrency($db);
 	$currency->code = $code;
 	$currency->name = !empty($langs->cache_currencies[$code]['label']) ? $langs->cache_currencies[$code]['label'].' ('.$langs->getCurrencySymbol($code).')' : $code;
 
-	if ($currency->create($user) > 0)
+	if (empty($rate))
 	{
-		if ($currency->addRate($rate)) setEventMessages($langs->trans('RecordSaved'), array());
-		else setEventMessages($langs->trans('ErrorAddRateFail'), array(), 'errors');
+		setEventMessages($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv("Rate")), null, 'errors');
+		$error++;
+	}
+	if (! $error)
+	{
+		if ($currency->create($user) > 0)
+		{
+			if ($currency->addRate($rate)) setEventMessages($langs->trans('RecordSaved'), array());
+			else setEventMessages($langs->trans('ErrorAddRateFail'), array(), 'errors');
+		}
+		else setEventMessages($langs->trans('ErrorAddCurrencyFail'), $currency->errors, 'errors');
 	}
-	else setEventMessages($langs->trans('ErrorAddCurrencyFail'), $currency->errors, 'errors');
 }
 elseif ($action == 'update_currency')
 {
+	$error = 0;
+
 	$submit = GETPOST('submit', 'alpha');
 
 	if ($submit == $langs->trans('Modify'))
 	{
 		$fk_multicurrency = GETPOST('fk_multicurrency', 'int');
-		$rate = GETPOST('rate', 'float');
+		$rate = price2num(GETPOST('rate', 'alpha'));
 		$currency = new MultiCurrency($db);
 
-		if ($currency->fetch($fk_multicurrency) > 0)
+		if (empty($rate))
 		{
-			$currency->updateRate($rate);
+			setEventMessages($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv("Rate")), null, 'errors');
+			$error++;
+		}
+		if (! $error)
+		{
+			if ($currency->fetch($fk_multicurrency) > 0)
+			{
+				$currency->updateRate($rate);
+			}
 		}
 	}
 	elseif ($submit == $langs->trans('Delete'))