diff --git a/src/helpers/channels/threads/add_to_thread.ts b/src/helpers/channels/threads/add_to_thread.ts
index fe0c2138d..3d9dab1db 100644
--- a/src/helpers/channels/threads/add_to_thread.ts
+++ b/src/helpers/channels/threads/add_to_thread.ts
@@ -3,12 +3,13 @@ import { rest } from "../../../rest/rest.ts";
 import { ChannelTypes } from "../../../types/channels/channel_types.ts";
 import { Errors } from "../../../types/discordeno/errors.ts";
 import { endpoints } from "../../../util/constants.ts";
-//TODO(threads): this does not work rn
-/** Adds the current user to a thread. Returns a 204 empty response on success. Also requires the thread is not archived. Fires a Thread Members Update Gateway event.Adds another user to a thread. Requires the ability to send messages in the thread. Also requires the thread is not archived. Returns a 204 empty response on success. Fires a Thread Members Update Gateway event.
- * @param userId the user to add to the thread defaults to bot
+import { botHasChannelPermissions, requireBotChannelPermissions } from "../../../util/permissions.ts";
+
+/** Adds the current user to a thread. Returns a 204 empty response on success. Also requires the thread is not archived. Fires a Thread Members Update Gateway event.
+ *  Adds another user to a thread. Requires the ability to send messages in the thread. Also requires the thread is not archived. Returns a 204 empty response on success. Fires a Thread Members Update Gateway event.
+ *  @param userId the user to add to the thread defaults to bot
  */
 export async function addToThread(channelId: bigint, userId?: bigint) {
-  // TODO(threads): perm check
   const channel = await cacheHandlers.get("channels", channelId);
   if (channel) {
     if (
@@ -18,6 +19,10 @@ export async function addToThread(channelId: bigint, userId?: bigint) {
     ) {
       throw new Error(Errors.NOT_A_THREAD_CHANNEL);
     }
+
+    if (!(await botHasChannelPermissions(channel, ["MANAGE_THREADS"])) && !channel.member) {
+      throw new Error(Errors.HAVE_TO_BE_PART_OF_THE_THREAD_OR_A_THREAD_MODERATOR_TO_ADD_OTHERS_TO_A_THREAD);
+    }
   }
 
   return await rest.runMethod(