diff --git a/packages/discord.js/typings/index.d.ts b/packages/discord.js/typings/index.d.ts
index 5c6270f19209..3c1f8064e9a4 100644
--- a/packages/discord.js/typings/index.d.ts
+++ b/packages/discord.js/typings/index.d.ts
@@ -2653,6 +2653,7 @@ export interface ThreadOnlyChannel
     | 'awaitMessages'
     | 'createMessageComponentCollector'
     | 'awaitMessageComponent'
+    | 'messages'
   > {}
 export abstract class ThreadOnlyChannel extends GuildChannel {
   public type: ChannelType.GuildForum | ChannelType.GuildMedia;
diff --git a/packages/discord.js/typings/index.test-d.ts b/packages/discord.js/typings/index.test-d.ts
index a88921b5f7a9..29204e7131db 100644
--- a/packages/discord.js/typings/index.test-d.ts
+++ b/packages/discord.js/typings/index.test-d.ts
@@ -213,6 +213,7 @@ import {
   PollData,
   InteractionCallbackResponse,
   GuildScheduledEventRecurrenceRuleOptions,
+  ThreadOnlyChannel,
 } from '.';
 import { expectAssignable, expectNotAssignable, expectNotType, expectType } from 'tsd';
 import type { ContextMenuCommandBuilder, SlashCommandBuilder } from '@discordjs/builders';
@@ -2453,6 +2454,16 @@ declare const partialGroupDMChannel: PartialGroupDMChannel;
 declare const categoryChannel: CategoryChannel;
 declare const stageChannel: StageChannel;
 declare const forumChannel: ForumChannel;
+declare const mediaChannel: MediaChannel;
+declare const threadOnlyChannel: ThreadOnlyChannel;
+
+// Threads have messages.
+expectType<GuildMessageManager>(threadChannel.messages);
+
+// Thread-only channels have threads—not messages.
+notPropertyOf(threadOnlyChannel, 'messages');
+notPropertyOf(forumChannel, 'messages');
+notPropertyOf(mediaChannel, 'messages');
 
 await forumChannel.edit({
   availableTags: [...forumChannel.availableTags, { name: 'tag' }],