diff --git a/src/methods.ts b/src/methods.ts
index fddcc8ab5..20a00b62f 100644
--- a/src/methods.ts
+++ b/src/methods.ts
@@ -154,7 +154,7 @@ export type ChannelsInviteArguments = TokenOverridable & {
 };
 export type ChannelsJoinArguments = TokenOverridable & {
   name: string;
-  validate: boolean;
+  validate?: boolean;
 };
 export type ChannelsKickArguments = TokenOverridable & {
   channel: string;