diff --git a/example-config.yaml b/example-config.yaml
index 9fa15ad6..7668c236 100644
--- a/example-config.yaml
+++ b/example-config.yaml
@@ -18,7 +18,8 @@ appservice:
     hostname: 0.0.0.0
     port: 8080
 
-    # The full URI to the database.
+    # The full URI to the database. SQLite and Postgres are fully supported.
+    # Other DBMSes supported by SQLAlchemy may or may not work.
     database: sqlite:///mautrix-telegram.db
 
     # Public part of web server for out-of-Matrix interaction with the bridge.