diff --git a/src/structures/Guild.js b/src/structures/Guild.js
index 88e3a55309a5..12cb4fd1c3ce 100644
--- a/src/structures/Guild.js
+++ b/src/structures/Guild.js
@@ -337,7 +337,7 @@ class Guild extends AnonymousGuild {
 
     /**
      * The preferred locale of the guild, defaults to `en-US`
-     * @type {?string}
+     * @type {string}
      * @see {@link https://discord.com/developers/docs/dispatch/field-values#predefined-field-values-accepted-locales}
      */
     this.preferredLocale = data.preferred_locale;
diff --git a/typings/index.d.ts b/typings/index.d.ts
index a5ca9b5aa335..c919b4cccd62 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -667,7 +667,7 @@ export class Guild extends AnonymousGuild {
   public members: GuildMemberManager;
   public mfaLevel: MFALevel;
   public ownerId: Snowflake;
-  public preferredLocale?: string;
+  public preferredLocale: string;
   public premiumSubscriptionCount: number | null;
   public premiumTier: PremiumTier;
   public presences: PresenceManager;