diff --git a/add_ons.go b/add_ons.go
index 72f4952..d33748e 100644
--- a/add_ons.go
+++ b/add_ons.go
@@ -71,12 +71,13 @@ type UnitAmount struct {
 	GBP int `xml:"GBP,omitempty"`
 	CAD int `xml:"CAD,omitempty"`
 	AUD int `xml:"AUD,omitempty"`
+	INR int `xml:"INR,omitempty"`
 }
 
 // MarshalXML ensures UnitAmount is not marshaled unless one or more currencies
 // has a value greater than zero.
 func (u UnitAmount) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
-	if u.USD > 0 || u.EUR > 0 || u.CAD > 0 || u.GBP > 0 || u.AUD > 0 {
+	if u.USD > 0 || u.EUR > 0 || u.CAD > 0 || u.GBP > 0 || u.AUD > 0 || u.INR > 0 {
 		type uaAlias UnitAmount
 		e.EncodeElement(uaAlias(u), start)
 	}
diff --git a/add_ons_test.go b/add_ons_test.go
index a904b87..6d4905a 100644
--- a/add_ons_test.go
+++ b/add_ons_test.go
@@ -244,6 +244,15 @@ func TestUnitAmount(t *testing.T) {
 				</s>
 			`),
 		},
+		{v: s{Amount: recurly.UnitAmount{INR: 500}},
+			expected: MustCompactString(`
+				<s>
+					<amount>
+						<INR>500</INR>
+					</amount>
+				</s>
+			`),
+		},
 	}
 
 	buf := new(bytes.Buffer)