diff --git a/packages/client/src/Structures/channels/Guild.ts b/packages/client/src/Structures/channels/Guild.ts
index d41351c8e..7cb480680 100644
--- a/packages/client/src/Structures/channels/Guild.ts
+++ b/packages/client/src/Structures/channels/Guild.ts
@@ -84,7 +84,7 @@ export class GuildChannel extends Channel {
     if (permission & BigInt(BitwisePermissionFlags.ADMINISTRATOR)) {
       return new Permission(BitwisePermissionFlags.ADMINISTRATOR)
     }
-    const channel = this instanceof ThreadChannel ? this.guild.channels.get(this.parentID) : this
+    const channel = this instanceof ThreadChannel && this.parentID ? this.guild.channels.get(this.parentID) : this
     let overwrite = channel?.permissionOverwrites.get(this.guild.id)
     if (overwrite) {
       permission = (permission & ~overwrite.deny) | overwrite.allow
diff --git a/packages/rest/src/manager.ts b/packages/rest/src/manager.ts
index 779ebc02f..215f37026 100644
--- a/packages/rest/src/manager.ts
+++ b/packages/rest/src/manager.ts
@@ -3371,7 +3371,7 @@ export interface RestManager {
            *
            * @see {@link https://discord.com/developers/docs/interactions/receiving-and-responding#create-followup-message}
            */
-          followup: (token: string, options: InteractionResponse) => Promise<Camelize<DiscordMessage>>
+          followup: (token: string, options: InteractionCallbackData) => Promise<Camelize<DiscordMessage>>
           /**
            * Sends a response to an interaction.
            *
@@ -5036,7 +5036,7 @@ export interface RestManager {
    *
    * @see {@link https://discord.com/developers/docs/interactions/receiving-and-responding#create-followup-message}
    */
-  sendFollowupMessage: (token: string, options: InteractionResponse) => Promise<Camelize<DiscordMessage>>
+  sendFollowupMessage: (token: string, options: InteractionCallbackData) => Promise<Camelize<DiscordMessage>>
   /**
    * Sends a response to an interaction.
    *