diff --git a/htdocs/public/paybox/newpayment.php b/htdocs/public/paybox/newpayment.php
index eb90814eb7b..9d7f79081a9 100644
--- a/htdocs/public/paybox/newpayment.php
+++ b/htdocs/public/paybox/newpayment.php
@@ -767,7 +767,7 @@ if (GETPOST("source") == 'membersubscription' && $valid)
 	    $valtoshow=GETPOST("newamount",'int');
 	    if (! empty($conf->global->MEMBER_MIN_AMOUNT) && $valtoshow) $valtoshow=max($conf->global->MEMBER_MIN_AMOUNT,$valtoshow);
         print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
-	    print '<input class="flat" size="8" type="text" name="newamount" value="'.$valtoshow.'">';
+	    print '<input class="flat" class="maxwidth75" type="text" name="newamount" value="'.price($valtoshow).'">';
 	}
 	else {
 	    $valtoshow=$amount;
diff --git a/htdocs/public/payment/newpayment.php b/htdocs/public/payment/newpayment.php
index fd1389ba8cb..efeb1323a3d 100644
--- a/htdocs/public/payment/newpayment.php
+++ b/htdocs/public/payment/newpayment.php
@@ -1235,7 +1235,7 @@ if ($source == 'membersubscription')
 		//$valtoshow=GETPOST("newamount",'int');
 		if (! empty($conf->global->MEMBER_MIN_AMOUNT) && $valtoshow) $valtoshow=max($conf->global->MEMBER_MIN_AMOUNT,$valtoshow);
 		print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
-		print '<input class="flat" size="8" type="text" name="newamount" value="'.$valtoshow.'">';
+		print '<input class="flat" class="maxwidth75" type="text" name="newamount" value="'.price($valtoshow).'">';
 	}
 	else {
 		$valtoshow=$amount;
diff --git a/htdocs/public/paypal/newpayment.php b/htdocs/public/paypal/newpayment.php
index 27024d48de1..fac192bd318 100644
--- a/htdocs/public/paypal/newpayment.php
+++ b/htdocs/public/paypal/newpayment.php
@@ -920,7 +920,7 @@ if (GETPOST("source") == 'membersubscription')
 	    $valtoshow=GETPOST("newamount",'int');
 	    if (! empty($conf->global->MEMBER_MIN_AMOUNT) && $valtoshow) $valtoshow=max($conf->global->MEMBER_MIN_AMOUNT,$valtoshow);
         print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
-	    print '<input class="flat" size="8" type="text" name="newamount" value="'.$valtoshow.'">';
+	    print '<input class="flat" class="maxwidth75" type="text" name="newamount" value="'.$valtoshow.'">';
 	}
 	else {
 	    $valtoshow=$amount;
diff --git a/htdocs/public/stripe/newpayment.php b/htdocs/public/stripe/newpayment.php
index dfd0425bb26..36b27658ee0 100644
--- a/htdocs/public/stripe/newpayment.php
+++ b/htdocs/public/stripe/newpayment.php
@@ -989,7 +989,7 @@ if (GETPOST("source") == 'membersubscription')
         $valtoshow=GETPOST("newamount",'int');
         if (! empty($conf->global->MEMBER_MIN_AMOUNT) && $valtoshow) $valtoshow=max($conf->global->MEMBER_MIN_AMOUNT,$valtoshow);
         print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
-        print '<input class="flat" size="8" type="text" name="newamount" value="'.$valtoshow.'">';
+        print '<input class="flat" class="maxwidth75" type="text" name="newamount" value="'.price($valtoshow).'">';
     }
     else {
         $valtoshow=$amount;