diff --git a/src/interactive-auth.ts b/src/interactive-auth.ts
index 4aa2c955769..161e85f8be1 100644
--- a/src/interactive-auth.ts
+++ b/src/interactive-auth.ts
@@ -61,6 +61,7 @@ export enum AuthType {
     Sso = "m.login.sso",
     SsoUnstable = "org.matrix.login.sso",
     Dummy = "m.login.dummy",
+    RegistrationToken = "org.matrix.msc3231.login.registration_token",
 }
 
 export interface IAuthDict {