diff --git a/packages/core/src/atom.ts b/packages/core/src/atom.ts
index 69068eadd..f67dbd8e7 100644
--- a/packages/core/src/atom.ts
+++ b/packages/core/src/atom.ts
@@ -671,7 +671,7 @@ function onCall(this: Action, cb: Fn): Unsubscribe {
   })
 }
 
-export function atom<T>(initState: (ctx: CtxSpy) => T, name?: string): Atom<T>
+export function atom<T>(callback: (ctx: CtxSpy) => T, name?: string): Atom<T>
 export function atom<T>(initState: T, name?: string): AtomMut<T>
 export function atom<T>(
   initState: T | ((ctx: CtxSpy) => T),