diff --git a/packages/builders/__tests__/messages/message.test.ts b/packages/builders/__tests__/messages/message.test.ts
index 963475b82..01d94c880 100644
--- a/packages/builders/__tests__/messages/message.test.ts
+++ b/packages/builders/__tests__/messages/message.test.ts
@@ -24,6 +24,19 @@ describe('Message', () => {
 		expect(() => message.toJSON()).toThrow();
 	});
 
+	test('GIVEN empty allowed mentions THEN return valid toJSON data', () => {
+		const allowedMentions = new AllowedMentionsBuilder();
+		expect(allowedMentions.toJSON()).toStrictEqual({});
+
+		const message = new MessageBuilder().setContent('test').setAllowedMentions();
+
+		expect(message.toJSON()).toStrictEqual({
+			...base,
+			allowed_mentions: {},
+			content: 'test',
+		});
+	});
+
 	test('GIVEN parse: [users] and empty users THEN return valid toJSON data', () => {
 		const allowedMentions = new AllowedMentionsBuilder();
 		allowedMentions.setUsers();
diff --git a/packages/builders/src/messages/Message.ts b/packages/builders/src/messages/Message.ts
index 716ce35b8..66feafa48 100644
--- a/packages/builders/src/messages/Message.ts
+++ b/packages/builders/src/messages/Message.ts
@@ -239,7 +239,7 @@ export class MessageBuilder
 		allowedMentions:
 			| AllowedMentionsBuilder
 			| APIAllowedMentions
-			| ((builder: AllowedMentionsBuilder) => AllowedMentionsBuilder),
+			| ((builder: AllowedMentionsBuilder) => AllowedMentionsBuilder) = new AllowedMentionsBuilder(),
 	): this {
 		this.data.allowed_mentions = resolveBuilder(allowedMentions, AllowedMentionsBuilder);
 		return this;