diff --git a/roles/matrix-synapse/defaults/main.yml b/roles/matrix-synapse/defaults/main.yml
index 079ffb4b6..834d9866a 100644
--- a/roles/matrix-synapse/defaults/main.yml
+++ b/roles/matrix-synapse/defaults/main.yml
@@ -497,7 +497,7 @@ matrix_synapse_ext_password_provider_shared_secret_auth_com_devture_shared_secre
 matrix_synapse_ext_password_provider_shared_secret_config: "{{ matrix_synapse_ext_password_provider_shared_secret_config_yaml|from_yaml }}"
 matrix_synapse_ext_password_provider_shared_secret_config_yaml: |
   shared_secret: {{ matrix_synapse_ext_password_provider_shared_secret_auth_shared_secret|string|to_json }}
-  m_login_password_support_enabled: {{ matrix_synapse_ext_password_provider_shared_secret_auth_m_login_password_support_enabled|bool|to_json }}
+  m_login_password_support_enabled: {{ matrix_synapse_ext_password_provider_shared_secret_auth_m_login_password_support_enabled|to_json }}
   com_devture_shared_secret_auth_support_enabled: {{ matrix_synapse_ext_password_provider_shared_secret_auth_com_devture_shared_secret_auth_support_enabled|to_json }}
 
 # Enable this to activate LDAP password provider