diff --git a/README.md b/README.md
index 0b1c2b8..d2e816c 100644
--- a/README.md
+++ b/README.md
@@ -340,7 +340,8 @@ $ bash build-docker-container.sh
 
 ## Debug SQL queries
 
-By default, d2-docker logs all SQL queries executed (one file per weekday). Example:
+To enable SQL-query logging, start your instance with the --enable-postgres-queries-logging option.
+d2-docker will log all SQL queries executed to a log named with the weekday. Example:
 
 ```
 $ db_container="d2-docker-docker-eyeseetea-com-samaritans-40-4-0-sp-cpr-test-db-1"