diff --git a/roles/matrix-synapse/defaults/main.yml b/roles/matrix-synapse/defaults/main.yml
index ac3026e8..3bdfca11 100644
--- a/roles/matrix-synapse/defaults/main.yml
+++ b/roles/matrix-synapse/defaults/main.yml
@@ -61,6 +61,7 @@ matrix_synapse_template_synapse_log: "{{ role_path }}/templates/synapse/synapse.
 
 matrix_synapse_macaroon_secret_key: ""
 matrix_synapse_registration_shared_secret: "{{ matrix_synapse_macaroon_secret_key }}"
+matrix_synapse_allow_guest_access: false
 matrix_synapse_form_secret: "{{ matrix_synapse_macaroon_secret_key }}"
 
 # The list of identity servers to use for Synapse.
@@ -223,6 +224,7 @@ matrix_synapse_database_database: ""
 
 matrix_synapse_turn_uris: []
 matrix_synapse_turn_shared_secret: ""
+matrix_synapse_turn_allow_guests: False
 
 matrix_synapse_email_enabled: false
 matrix_synapse_email_smtp_host: ""
diff --git a/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2 b/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2
index 124825ad..9f8dffaf 100644
--- a/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2
+++ b/roles/matrix-synapse/templates/synapse/homeserver.yaml.j2
@@ -749,7 +749,7 @@ turn_shared_secret: {{ matrix_synapse_turn_shared_secret|string|to_json }}
 # connect to arbitrary endpoints without having first signed up for a
 # valid account (e.g. by passing a CAPTCHA).
 #
-turn_allow_guests: False
+turn_allow_guests: {{ matrix_synapse_turn_allow_guests }}
 
 
 ## Registration ##
@@ -854,7 +854,7 @@ registration_shared_secret: {{ matrix_synapse_registration_shared_secret|string|
 # participate in rooms hosted on this server which have been made
 # accessible to anonymous users.
 #
-#allow_guest_access: false
+allow_guest_access: {{ matrix_synapse_allow_guest_access }}
 
 # The identity server which we suggest that clients should use when users log
 # in on this server.