diff --git a/roles/matrix-server/defaults/main.yml b/roles/matrix-server/defaults/main.yml
index d8b45fdf..f539d539 100644
--- a/roles/matrix-server/defaults/main.yml
+++ b/roles/matrix-server/defaults/main.yml
@@ -141,7 +141,7 @@ matrix_synapse_password_providers_enabled: false
 # See: https://github.com/kamax-io/matrix-synapse-rest-auth
 matrix_synapse_ext_password_provider_rest_auth_enabled: false
 matrix_synapse_ext_password_provider_rest_auth_download_url: "https://raw.githubusercontent.com/kamax-io/matrix-synapse-rest-auth/v0.1.1/rest_auth_provider.py"
-matrix_synapse_ext_password_provider_rest_auth_endpoint: ""
+matrix_synapse_ext_password_provider_rest_auth_endpoint: http://matrix-mxisd:8090
 matrix_synapse_ext_password_provider_rest_auth_registration_enforce_lowercase: false
 matrix_synapse_ext_password_provider_rest_auth_registration_profile_name_autofill: true
 matrix_synapse_ext_password_provider_rest_auth_login_profile_name_autofill: false