diff --git a/typings/index.d.ts b/typings/index.d.ts
index d22f6325b..f1e26d067 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -831,7 +831,7 @@ export class Interaction extends Base {
   public type: InteractionType;
   public user: User;
   public version: number;
-  public inGuild(): boolean;
+  public inGuild(): this is this & { guildId: Snowflake; member: GuildMember | APIInteractionGuildMember };
   public isButton(): this is ButtonInteraction;
   public isCommand(): this is CommandInteraction;
   public isMessageComponent(): this is MessageComponentInteraction;
diff --git a/typings/index.ts b/typings/index.ts
index e5461e76e..2f735626f 100644
--- a/typings/index.ts
+++ b/typings/index.ts
@@ -15,6 +15,7 @@ import {
   GuildMember,
   GuildResolvable,
   Intents,
+  Interaction,
   Message,
   MessageActionRow,
   MessageAttachment,
@@ -604,3 +605,7 @@ client.on('messageReactionAdd', async reaction => {
   if (reaction.message.partial) return assertType<string | null>(reaction.message.content);
   assertType<string>(reaction.message.content);
 });
+
+// Test interactions
+declare const interaction: Interaction;
+if (interaction.inGuild()) assertType<Snowflake>(interaction.guildId);