diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index 3169e18e4..717e71bc6 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -67,6 +67,11 @@ matrix_appservice_discord_appservice_token: "{{ matrix_synapse_macaroon_secret_k
 
 matrix_appservice_discord_homeserver_token: "{{ matrix_synapse_macaroon_secret_key | password_hash('sha512', 'discord.hs.token') | to_uuid }}"
 
+# We only make this use Postgres if our own Postgres server is enabled.
+# It's only then (for now) that we can automatically create the necessary database and user for this service.
+matrix_appservice_discord_database_engine: "{{ 'postgres' if matrix_postgres_enabled else 'sqlite' }}"
+matrix_appservice_discord_database_connString_password: "{{ matrix_synapse_macaroon_secret_key | password_hash('sha512', 'as.discord.db') }}"
+
 ######################################################################
 #
 # /matrix-bridge-appservice-discord
@@ -892,10 +897,10 @@ matrix_postgres_db_name: "homeserver"
 matrix_postgres_additional_databases: |
   {{
     ([{
-      'name': 'matrix_appservice_discord',
-      'username': 'matrix_appservice_discord',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'app_discord.db.secret') | string,
-    }] if matrix_appservice_discord_enabled else [])
+      'name': matrix_appservice_discord_database_connString_db_name,
+      'username': matrix_appservice_discord_database_connString_username,
+      'password': matrix_appservice_discord_database_connString_password,
+    }] if (matrix_appservice_discord_enabled and matrix_appservice_discord_database_engine == 'postgres' and matrix_appservice_discord_database_connString_hostname == 'matrix-postgres') else [])
     + ([{
       'name': 'matrix_appservice_slack',
       'username': 'matrix_appservice_slack',
diff --git a/roles/matrix-bridge-appservice-discord/defaults/main.yml b/roles/matrix-bridge-appservice-discord/defaults/main.yml
index 357b93d64..36b39b8e3 100644
--- a/roles/matrix-bridge-appservice-discord/defaults/main.yml
+++ b/roles/matrix-bridge-appservice-discord/defaults/main.yml
@@ -41,6 +41,22 @@ matrix_appservice_discord_bridge_homeserverUrl: "http://matrix-synapse:8008"
 matrix_appservice_discord_bridge_disablePresence: false
 matrix_appservice_discord_bridge_enableSelfServiceBridging: false
 
+# Database-related configuration fields.
+#
+# To use SQLite, stick to these defaults.
+#
+# To use Postgres:
+# - change the engine (`matrix_appservice_discord_database_engine: 'postgres'`)
+# - adjust your database credentials
+matrix_appservice_discord_database_engine: 'sqlite'
+matrix_appservice_discord_database_filename: "/data/discord.db"
+matrix_appservice_discord_database_connString: 'postgresql://{{ matrix_appservice_discord_database_connString_username }}:{{ matrix_appservice_discord_database_connString_password }}@{{ matrix_appservice_discord_database_connString_hostname }}:{{ matrix_appservice_discord_database_connString_port }}/{{ matrix_appservice_discord_database_connString_db_name }}'
+matrix_appservice_discord_database_connString_username: 'matrix_appservice_discord'
+matrix_appservice_discord_database_connString_password: 'some-password'
+matrix_appservice_discord_database_connString_hostname: 'matrix-postgres'
+matrix_appservice_discord_database_connString_port: 5432
+matrix_appservice_discord_database_connString_db_name: 'matrix_appservice_discord'
+
 # Tells whether the bot should make use of "Privileged Gateway Intents".
 #
 # Enabling this means that you need to enable it for the bot (Discord application) as well,
diff --git a/roles/matrix-bridge-appservice-discord/tasks/validate_config.yml b/roles/matrix-bridge-appservice-discord/tasks/validate_config.yml
index b0713a43d..73253ba03 100644
--- a/roles/matrix-bridge-appservice-discord/tasks/validate_config.yml
+++ b/roles/matrix-bridge-appservice-discord/tasks/validate_config.yml
@@ -20,3 +20,7 @@
   when: "item.old in vars"
   with_items:
     - {'old': 'matrix_appservice_discord_container_expose_client_server_api_port', 'new': '<superseded by matrix_appservice_discord_container_http_host_bind_port>'}
+
+- name: Require a valid database engine
+  fail: msg="`matrix_appservice_discord_database_engine` needs to be either 'sqlite' or 'postgres'"
+  when: "matrix_appservice_discord_database_engine not in ['sqlite', 'postgres']"
diff --git a/roles/matrix-bridge-appservice-discord/templates/config.yaml.j2 b/roles/matrix-bridge-appservice-discord/templates/config.yaml.j2
index de4182d9a..b2ecd1981 100644
--- a/roles/matrix-bridge-appservice-discord/templates/config.yaml.j2
+++ b/roles/matrix-bridge-appservice-discord/templates/config.yaml.j2
@@ -58,8 +58,11 @@ database:
   # If you are migrating, see https://github.com/Half-Shot/matrix-appservice-discord/blob/master/docs/howto.md#migrate-to-postgres-from-sqlite
   # WARNING: You will almost certainly be fine with sqlite unless your bridge
   # is in heavy demand and you suffer from IO slowness.
-  #filename: "/data/discord.db"
-  connString: "postgresql://matrix_appservice_discord:{{ matrix_additional_databases | selectattr('name', 'equalto', 'matrix_appservice_discord') | map(attribute='pass') | first }}@{{ matrix_postgres_connection_hostname }}/matrix_appservice_discord"
+  {% if matrix_appservice_discord_database_engine == 'sqlite' %}
+  filename: {{ matrix_appservice_discord_database_filename|to_json }}
+  {% else %}
+  connString: {{ matrix_appservice_discord_database_connString|to_json }}
+  {% endif %}
 room:
   # Set the default visibility of alias rooms, defaults to "public".
   # One of: "public", "private"