diff --git a/packages/discord.js/typings/index.d.ts b/packages/discord.js/typings/index.d.ts
index e9068fd0f..0c965f2a0 100644
--- a/packages/discord.js/typings/index.d.ts
+++ b/packages/discord.js/typings/index.d.ts
@@ -2752,6 +2752,7 @@ 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 c21271cf6..a107c8549 100644
--- a/packages/discord.js/typings/index.test-d.ts
+++ b/packages/discord.js/typings/index.test-d.ts
@@ -214,6 +214,7 @@ import {
   PollData,
   UserManager,
   InteractionCallbackResponse,
+  ThreadOnlyChannel,
 } from '.';
 import {
   expectAssignable,
@@ -2457,6 +2458,16 @@ 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' }],