diff --git a/src/invidious/routes/api/v1/authentication.cr b/src/invidious/routes/api/v1/authentication.cr
index 1fc8eb06..010e0d7d 100644
--- a/src/invidious/routes/api/v1/authentication.cr
+++ b/src/invidious/routes/api/v1/authentication.cr
@@ -64,7 +64,7 @@ module Invidious::Routes::API::V1::Authentication
             end
           else
             # send captcha
-            captcha = Invidious::User::Captcha.generate_text(HMAC_KEY, ":captcha")
+            captcha = Invidious::User::Captcha.generate_text(HMAC_KEY, ":register")
             # puts captcha
             response = JSON.build do |json|
               json.object do