diff --git a/installers/full_install_osm.sh b/installers/full_install_osm.sh
index 6f80953..fb8270f 100755
--- a/installers/full_install_osm.sh
+++ b/installers/full_install_osm.sh
@@ -286,7 +286,7 @@
         OSM_HELM_OPTS="${OSM_HELM_OPTS} --set vca.cacert=${OSM_VCA_CACERT}"
     fi
     [ -n "$OSM_VCA_APIPROXY" ] && OSM_HELM_OPTS="${OSM_HELM_OPTS} --set lcm.config.OSMLCM_VCA_APIPROXY=${OSM_VCA_APIPROXY}"
-    [ ! "$OSM_DOCKER_TAG" == "testing-daily" ] && OSM_HELM_OPTS="${OSM_HELM_OPTS} --set global.image.tag=${OSM_DOCKER_TAG}"
+    [ ! "$OSM_DOCKER_TAG" == "testing-daily" ] && OSM_HELM_OPTS="${OSM_HELM_OPTS} --set-string global.image.tag=${OSM_DOCKER_TAG}"
     [ -n "${INSTALL_NGSA}" ] || OSM_HELM_OPTS="${OSM_HELM_OPTS} --set global.oldServiceAssurance=true"
     if [ -n "${OSM_BEHIND_PROXY}" ]; then
         OSM_HELM_OPTS="${OSM_HELM_OPTS} --set global.behindHttpProxy=true"