diff --git a/packages/discord.js/src/structures/BaseInteraction.js b/packages/discord.js/src/structures/BaseInteraction.js
index 28d1e4b35..4e7ad59e4 100644
--- a/packages/discord.js/src/structures/BaseInteraction.js
+++ b/packages/discord.js/src/structures/BaseInteraction.js
@@ -122,6 +122,12 @@ class BaseInteraction extends Base {
      * @type {?InteractionContextType}
      */
     this.context = data.context ?? null;
+
+    /**
+     * Attachment size limit in bytes
+     * @type {number}
+     */
+    this.attachmentSizeLimit = data.attachment_size_limit;
   }
 
   /**
diff --git a/packages/discord.js/typings/index.d.ts b/packages/discord.js/typings/index.d.ts
index f13705859..659b73ad2 100644
--- a/packages/discord.js/typings/index.d.ts
+++ b/packages/discord.js/typings/index.d.ts
@@ -2102,6 +2102,7 @@ export class BaseInteraction<Cached extends CacheType = CacheType> extends Base
   public locale: Locale;
   public guildLocale: CacheTypeReducer<Cached, Locale>;
   public entitlements: Collection<Snowflake, Entitlement>;
+  public attachmentSizeLimit: number;
   public inGuild(): this is BaseInteraction<'raw' | 'cached'>;
   public inCachedGuild(): this is BaseInteraction<'cached'>;
   public inRawGuild(): this is BaseInteraction<'raw'>;