diff --git a/README.md b/README.md
index d3dc2a8..616755b 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ fi
 "${mongo_init_bin}" <<EOF
 use ${MONGO_AUTHSOURCE}
 db.auth("${MONGO_INITDB_ROOT_USERNAME}", "${MONGO_INITDB_ROOT_PASSWORD}")
+db=db.getSiblingDB("${MONGO_DBNAME}")
 db.createUser({
   user: "${MONGO_USER}",
   pwd: "${MONGO_PASS}",
diff --git a/readme-vars.yml b/readme-vars.yml
index 97d1325..41325ff 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -77,6 +77,7 @@ app_setup_block: |
   "${mongo_init_bin}" <<EOF
   use ${MONGO_AUTHSOURCE}
   db.auth("${MONGO_INITDB_ROOT_USERNAME}", "${MONGO_INITDB_ROOT_PASSWORD}")
+  db=db.getSiblingDB("${MONGO_DBNAME}")
   db.createUser({
     user: "${MONGO_USER}",
     pwd: "${MONGO_PASS}",