diff --git a/index.d.ts b/index.d.ts
index 8145ac5..71a30b0 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -30,8 +30,8 @@ declare module "react-css-themr"
 	}
 
 	export function themr(
-		identifier: string,
+		identifier: string | number | symbol,
 		defaultTheme?: {},
 		options?: IThemrOptions
-	): <P, S>(component: new(props?: P, context?: any) => React.Component<P, S>) => ThemedComponentClass<P, S>;
+  ): <P, S>(component: (new(props?: P, context?: any) => React.Component<P, S>) | React.SFC<P>) => ThemedComponentClass<P, S>;
 }