diff --git a/react-select/index.d.ts b/react-select/index.d.ts
index a7c0f2f17a..b149fd4c47 100644
--- a/react-select/index.d.ts
+++ b/react-select/index.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for react-select v1.0.0
 // Project: https://github.com/JedWatson/react-select
-// Definitions by: ESQUIBET Hugo <https://github.com/Hesquibet/>, Gilad Gray <https://github.com/giladgray/>, Izaak Baker <https://github.com/iebaker/>, Tadas Dailyda <https://github.com/skirsdeda/>, Mark Vujevits <https://github.com/vujevits/>
+// Definitions by: ESQUIBET Hugo <https://github.com/Hesquibet/>, Gilad Gray <https://github.com/giladgray/>, Izaak Baker <https://github.com/iebaker/>, Tadas Dailyda <https://github.com/skirsdeda/>, Mark Vujevits <https://github.com/vujevits/>, Mike Deverell <https://github.com/devrelm/>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.1
 
@@ -272,6 +272,10 @@ declare namespace ReactSelectClass {
          * @default false
          */
         openOnFocus?: boolean;
+        /**
+         * className to add to each option component
+         */
+        optionClassName?: string;
         /**
          * option component to render in dropdown
          */
diff --git a/react-select/react-select-tests.tsx b/react-select/react-select-tests.tsx
index d2704878d9..7840f2ce9e 100644
--- a/react-select/react-select-tests.tsx
+++ b/react-select/react-select-tests.tsx
@@ -99,6 +99,7 @@ class SelectTest extends React.Component<React.Props<{}>, {}> {
             className: "test-select",
             key: "1",
             options: options,
+            optionClassName: 'test-select-option',
             optionRenderer: optionRenderer,
             autofocus: true,
             autosize: true,