diff --git a/src/object.ts b/src/object.ts
index 843a62e5e..6bba24986 100644
--- a/src/object.ts
+++ b/src/object.ts
@@ -460,7 +460,7 @@ export interface OptionalObjectSchema<
   TContext extends AnyObject = AnyObject,
   TIn extends Maybe<TypeOfShape<TShape>> = TypeOfShape<TShape>
 > extends ObjectSchema<TShape, TContext, TIn> {
-  default<TNextDefault extends Maybe<Record<string, any>>>(
+  default<TNextDefault extends Maybe<AnyObject>>(
     def: TNextDefault | (() => TNextDefault),
   ): TNextDefault extends undefined
     ? ObjectSchema<TShape, TContext, TIn | undefined>
@@ -507,7 +507,7 @@ export interface DefinedObjectSchema<
     TIn,
     AssertsShape<TShape> | Extract<TIn, null>
   > {
-  default<TNextDefault extends Maybe<Record<string, any>>>(
+  default<TNextDefault extends Maybe<AnyObject>>(
     def: TNextDefault | (() => TNextDefault),
   ): TNextDefault extends undefined
     ? DefinedObjectSchema<TShape, TContext, TIn | undefined>
@@ -548,7 +548,7 @@ export interface RequiredObjectSchema<
   TContext extends AnyObject,
   TIn extends Maybe<TypeOfShape<TShape>>
 > extends ObjectSchema<TShape, TContext, TIn, AssertsShape<TShape>> {
-  default<TNextDefault extends Maybe<Record<string, any>>>(
+  default<TNextDefault extends Maybe<AnyObject>>(
     def: TNextDefault | (() => TNextDefault),
   ): TNextDefault extends undefined
     ? RequiredObjectSchema<TShape, TContext, TIn | undefined>
diff --git a/src/schema.ts b/src/schema.ts
index 69f50caca..7ffaccd91 100644
--- a/src/schema.ts
+++ b/src/schema.ts
@@ -25,7 +25,7 @@ import {
 } from './types';
 
 import ValidationError from './ValidationError';
-import type { Asserts } from './util/types';
+import type { Asserts, Thunk } from './util/types';
 import ReferenceSet from './util/ReferenceSet';
 import Reference from './Reference';
 
@@ -489,9 +489,7 @@ export default abstract class BaseSchema<
     return schema._getDefault();
   }
 
-  default<TNextDefault extends Maybe<TCast>>(
-    def: TNextDefault | (() => TNextDefault),
-  ): any {
+  default(def: Thunk<any>): any {
     if (arguments.length === 0) {
       return this._getDefault();
     }