diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index f3798e4..37e0467 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -77,6 +77,7 @@
     echo -e "     [--lxd <yaml path>]:         Takes a YAML file as a parameter with the LXD Cloud information (--charmed option)"
     echo -e "     [--lxd-cred <yaml path>]:    Takes a YAML file as a parameter with the LXD Credentials information (--charmed option)"
     echo -e "     [--microstack]:              Installs microstack as a vim. (--charmed option)"
+    echo -e "     [--overlay]:                 Add an overlay to override some defaults of the default bundle (--charmed option)"
     echo -e "     [--ha]:                      Installs High Availability bundle. (--charmed option)"
     echo -e "     [--tag]:                     Docker image tag. (--charmed option)"
     echo -e "     [--registry]:                Docker registry with optional credentials as user:pass@hostname:port (--charmed option)"