diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..57825e4
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,5 @@
+export declare const CallableInstance: ICallableInstance;
+export interface ICallableInstance {
+	new <T>(property: string | symbol): (...argv) => T;
+	<T>(...argv: any[]): T;
+}