diff --git a/react-css-modules/react-css-modules.d.ts b/react-css-modules/react-css-modules.d.ts
index 2ee125bfa6..d8a414d35f 100644
--- a/react-css-modules/react-css-modules.d.ts
+++ b/react-css-modules/react-css-modules.d.ts
@@ -19,8 +19,11 @@ declare module 'react-css-modules' {
     }
 
     module CSSModules {
+        // Extend your component's Prop interface with this one to get access to `this.props.styles`
+        //
+        // interface MyComponentProps extends CSSModules.InjectedCSSModuleProps {}
         interface InjectedCSSModuleProps {
-            styles: StylesObject;
+            styles?: StylesObject;
         }
     }