diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index d5de3f5..2cd7b59 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -31,7 +31,8 @@
     echo -e "     --lxdimages:    download lxd images from OSM repository instead of creating them from scratch"
     echo -e "     -l <lxd_repo>:  use specified repository url for lxd images"
     echo -e "     -p <path>:      use specified repository path for lxd images"
-    echo -e "     --lightweight:  install lightweight build of OSM"
+    echo -e "     --lightweight:  install lightweight build of OSM (default installation)"
+    echo -e "     --soui:         install classic build of OSM (based on LXD containers, with SO and UI)"
     echo -e "     --vimemu:       additionally fetch, build, and deploy the VIM emulator as a docker container"
     echo -e "     --develop:      (deprecated, use '-b master') install OSM from source code using the master branch"
 #    echo -e "     --reconfigure:  reconfigure the modules (DO NOT change NAT rules)"
@@ -689,7 +690,7 @@
 INSTALL_FROM_LXDIMAGES=""
 LXD_REPOSITORY_BASE="https://osm-download.etsi.org/repository/osm/lxd"
 LXD_REPOSITORY_PATH=""
-INSTALL_LIGHTWEIGHT=""
+INSTALL_LIGHTWEIGHT="y"
 NOCONFIGURE=""
 RELEASE_DAILY=""
 SESSION_ID=`date +%s`
@@ -736,6 +737,7 @@
             [ "${OPTARG}" == "lxdinstall" ] && INSTALL_LXD="y" && continue
             [ "${OPTARG}" == "lxdimages" ] && INSTALL_FROM_LXDIMAGES="y" && continue
             [ "${OPTARG}" == "lightweight" ] && INSTALL_LIGHTWEIGHT="y" && continue
+            [ "${OPTARG}" == "soui" ] && INSTALL_LIGHTWEIGHT="" && && continue
             [ "${OPTARG}" == "vimemu" ] && INSTALL_VIMEMU="y" && continue
             [ "${OPTARG}" == "noconfigure" ] && NOCONFIGURE="y" && continue
             [ "${OPTARG}" == "showopts" ] && SHOWOPTS="y" && continue