diff --git a/roles/custom/matrix-authentication-service/defaults/main.yml b/roles/custom/matrix-authentication-service/defaults/main.yml
index 838456bc7..4d724e006 100644
--- a/roles/custom/matrix-authentication-service/defaults/main.yml
+++ b/roles/custom/matrix-authentication-service/defaults/main.yml
@@ -219,6 +219,11 @@ matrix_authentication_service_config_account_displayname_change_allowed: true
 # This has no effect if password login is disabled.
 matrix_authentication_service_config_account_password_registration_enabled: false
 
+# Controls the `account.password_registration_email_required` configuration setting.
+#
+# Whether self-service password registrations require a valid email.
+matrix_authentication_service_config_account_password_registration_email_required: true
+
 # Controls the `account.password_change_allowed` configuration setting.
 #
 # Whether users are allowed to change their passwords.
diff --git a/roles/custom/matrix-authentication-service/templates/config.yaml.j2 b/roles/custom/matrix-authentication-service/templates/config.yaml.j2
index 38dd62948..0060584be 100644
--- a/roles/custom/matrix-authentication-service/templates/config.yaml.j2
+++ b/roles/custom/matrix-authentication-service/templates/config.yaml.j2
@@ -65,6 +65,7 @@ account:
   email_change_allowed: {{ matrix_authentication_service_config_account_email_change_allowed | to_json }}
   displayname_change_allowed: {{ matrix_authentication_service_config_account_displayname_change_allowed | to_json }}
   password_registration_enabled: {{ matrix_authentication_service_config_account_password_registration_enabled | to_json }}
+  password_registration_email_required: {{ matrix_authentication_service_config_account_password_registration_email_required | to_json }}
   password_change_allowed: {{ matrix_authentication_service_config_account_password_change_allowed | to_json }}
   password_recovery_enabled: {{ matrix_authentication_service_config_account_password_recovery_enabled | to_json }}
   account_deactivation_allowed: {{ matrix_authentication_service_config_account_account_deactivation_allowed | to_json }}