diff --git a/app/views/checkout/_billing.html.haml b/app/views/checkout/_billing.html.haml
index 2fceedb523..1e7adec1ad 100644
--- a/app/views/checkout/_billing.html.haml
+++ b/app/views/checkout/_billing.html.haml
@@ -19,13 +19,13 @@
                 {{ summary() | printArray }}
           .small-4.medium-2.columns.text-right
             %span.accordion-up
-              %em 
+              %em
                 %small Hide
-              %i.ofn-i_053-point-up 
+              %i.ofn-i_053-point-up
             %span.accordion-down
-              %em 
+              %em
                 %small Expand
-              %i.ofn-i_052-point-down   
+              %i.ofn-i_052-point-down
 
       = f.fields_for :bill_address, @order.bill_address do |ba|
         .row
@@ -40,7 +40,7 @@
 
           .small-6.columns
             = ba.select :state_id, @order.billing_address.country.states.map{|c|[c.name, c.id]}, {include_blank: false},
-              "ng-model" => "order.bill_address.state_id"
+              "ng-model" => "order.bill_address.state_id", required: true
         .row
           .small-6.columns
             = validated_input "Postcode", "order.bill_address.zipcode"