diff --git a/index.d.ts b/index.d.ts
index 9429799..4204a51 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -292,7 +292,7 @@ declare class Emittery<
 	static mixin(
 		emitteryPropertyName: string | symbol,
 		methodNames?: readonly string[]
-	): <T extends {new (): any}>(klass: T) => T; // eslint-disable-line @typescript-eslint/prefer-function-type
+	): <T extends {new (...arguments_: any[]): any}>(klass: T) => T; // eslint-disable-line @typescript-eslint/prefer-function-type
 
 	/**
 	Subscribe to one or more events.
diff --git a/index.test-d.ts b/index.test-d.ts
index 2bd77fa..7b28577 100644
--- a/index.test-d.ts
+++ b/index.test-d.ts
@@ -279,3 +279,8 @@ type AnyListener = (eventData?: unknown) => void | Promise<void>;
 Emittery.mixin('emittery')(class {
 	test() {}
 });
+
+// Mixin type - arguments in constructor
+Emittery.mixin('emittery')(class { // eslint-disable-line @typescript-eslint/no-extraneous-class
+	constructor(argument: string) {} // eslint-disable-line @typescript-eslint/no-useless-constructor
+});