diff --git a/docs/guide/walkthrough/first-event.md b/docs/guide/walkthrough/first-event.md
index 258ba6e09..331d55b4f 100644
--- a/docs/guide/walkthrough/first-event.md
+++ b/docs/guide/walkthrough/first-event.md
@@ -43,7 +43,7 @@ export default eventModule({
   type: EventType.Discord,
   plugins : [], //NOT SUPPORTED YET!!
   name: 'guildMemberAdd', //name of event.
-  async execute(member) {
+  async execute(member: GuildMember) {
     (await member.guild.channels.fetch('channel-id') as TextChannel).send(`Welcome, ${member}`); 
   }
 })