diff --git a/source/index.ts b/source/index.ts
index fe3a74b..269b316 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -128,11 +128,10 @@ const cli = meow(`
 foo(cli.input.at(0), cli.flags);
 ```
 */
-export default function meow<Flags extends AnyFlags>(helpMessage: string, options?: Options<Flags>): Result<Flags>;
-export default function meow<Flags extends AnyFlags>(options?: Options<Flags>): Result<Flags>;
-// TODO: should these be optional? importMeta is always needed
+export default function meow<Flags extends AnyFlags>(helpMessage: string, options: Options<Flags>): Result<Flags>;
+export default function meow<Flags extends AnyFlags>(options: Options<Flags>): Result<Flags>;
 
-export default function meow<Flags extends AnyFlags>(helpMessage?: string | Options<Flags>, options?: Options<Flags>): Result<Flags> {
+export default function meow<Flags extends AnyFlags>(helpMessage: string | Options<Flags>, options?: Options<Flags>): Result<Flags> {
 	if (typeof helpMessage !== 'string') {
 		options = helpMessage;
 		helpMessage = '';
diff --git a/test-d/index.ts b/test-d/index.ts
index 271d447..84e41bb 100644
--- a/test-d/index.ts
+++ b/test-d/index.ts
@@ -5,7 +5,8 @@ import meow from '../source/index.js';
 
 const importMeta = import.meta;
 
-expectType<Result<never>>(meow('Help text'));
+expectError(meow('Help text'));
+expectError(meow('Help text', {}));
 expectType<Result<never>>(meow('Help text', {importMeta, hardRejection: false}));
 expectAssignable<{flags: {foo: number}}>(
 	meow({importMeta: import.meta, flags: {foo: {type: 'number', isRequired: true}}}),