diff --git a/roles/matrix-synapse/defaults/main.yml b/roles/matrix-synapse/defaults/main.yml
index 3bdfca11..b4ac75e3 100644
--- a/roles/matrix-synapse/defaults/main.yml
+++ b/roles/matrix-synapse/defaults/main.yml
@@ -64,6 +64,8 @@ matrix_synapse_registration_shared_secret: "{{ matrix_synapse_macaroon_secret_ke
 matrix_synapse_allow_guest_access: false
 matrix_synapse_form_secret: "{{ matrix_synapse_macaroon_secret_key }}"
 
+matrix_synapse_id_servers_public: ['matrix.org', 'vector.im']
+
 # The list of identity servers to use for Synapse.
 # We assume this role runs standalone without a local Identity server, so we point Synapse to public ones.
 # This most likely gets overwritten later, so that a local Identity server is used.