diff --git a/DotNetShipping/ShippingProviders/UPSProvider.cs b/DotNetShipping/ShippingProviders/UPSProvider.cs
index 06716a4..2c7060f 100644
--- a/DotNetShipping/ShippingProviders/UPSProvider.cs
+++ b/DotNetShipping/ShippingProviders/UPSProvider.cs
@@ -177,6 +177,10 @@ private byte[] BuildRatesRequestMessage()
             writer.WriteEndElement(); // </Shipper>
             writer.WriteStartElement("ShipTo");
             writer.WriteStartElement("Address");
+            if (!string.IsNullOrWhiteSpace(Shipment.DestinationAddress.State))
+            {
+                writer.WriteElementString("StateProvinceCode", Shipment.DestinationAddress.State);
+            }
             if (Shipment.DestinationAddress.IsUnitedStatesAddress() || Shipment.DestinationAddress.IsCanadaAddress())
             {
                 writer.WriteElementString("PostalCode", Shipment.DestinationAddress.PostalCode);