diff --git a/roles/matrix-bridge-mautrix-twitter/defaults/main.yml b/roles/matrix-bridge-mautrix-twitter/defaults/main.yml
index f8fd29c8..c7130f3f 100644
--- a/roles/matrix-bridge-mautrix-twitter/defaults/main.yml
+++ b/roles/matrix-bridge-mautrix-twitter/defaults/main.yml
@@ -34,6 +34,9 @@ matrix_mautrix_twitter_systemd_wanted_services_list: []
 matrix_mautrix_twitter_appservice_token: ''
 matrix_mautrix_twitter_homeserver_token: ''
 
+# Whether or not created rooms should have federation enabled.
+# If false, created portal rooms will never be federated.
+matrix_mautrix_twitter_federate_rooms: true
 
 # Database-related configuration fields.
 #
diff --git a/roles/matrix-bridge-mautrix-twitter/templates/config.yaml.j2 b/roles/matrix-bridge-mautrix-twitter/templates/config.yaml.j2
index 12e45f18..f0ae69b2 100644
--- a/roles/matrix-bridge-mautrix-twitter/templates/config.yaml.j2
+++ b/roles/matrix-bridge-mautrix-twitter/templates/config.yaml.j2
@@ -105,7 +105,7 @@ bridge:
     login_shared_secret_map: {{ matrix_mautrix_twitter_bridge_login_shared_secret_map|to_json }}
     # Whether or not created rooms should have federation enabled.
     # If false, created portal rooms will never be federated.
-    federate_rooms: true
+    federate_rooms: {{ matrix_mautrix_twitter_federate_rooms|to_json }}
     # Settings for backfilling messages from Twitter.
     #
     # Missed message backfilling is currently based on receiving them from the Twitter polling API,