diff --git a/roles/matrix-bridge-mautrix-wsproxy/defaults/main.yml b/roles/matrix-bridge-mautrix-wsproxy/defaults/main.yml
index df37e059..71ad4e38 100644
--- a/roles/matrix-bridge-mautrix-wsproxy/defaults/main.yml
+++ b/roles/matrix-bridge-mautrix-wsproxy/defaults/main.yml
@@ -15,6 +15,8 @@ matrix_mautrix_wsproxy_data_path: "{{ matrix_mautrix_wsproxy_base_path }}/data"
 matrix_mautrix_wsproxy_homeserver_address: "{{ matrix_homeserver_container_url }}"
 matrix_mautrix_wsproxy_homeserver_domain: "{{ matrix_domain }}"
 
+matrix_mautrix_wsproxy_appservice_address: "http://matrix-mautrix-wsproxy:29331"
+
 matrix_mautrix_wsproxy_port: 29931
 # A list of extra arguments to pass to the container
 matrix_mautrix_wsproxy_container_extra_arguments: []