diff --git a/install/opencloud-install.sh b/install/opencloud-install.sh
index 675a4eff1..0088a4e37 100644
--- a/install/opencloud-install.sh
+++ b/install/opencloud-install.sh
@@ -102,7 +102,7 @@ PROXY_CSP_CONFIG_FILE_LOCATION=${CONFIG_DIR}/csp.yaml
 COLLABORA_DOMAIN=${COLLABORA_FQDN}
 COLLABORATION_APP_NAME="CollaboraOnline"
 COLLABORATION_APP_PRODUCT="Collabora"
-COLLABORATION_APP_ADDR=https://${COLLABORA_HOST}
+COLLABORATION_APP_ADDR=https://${COLLABORA_FQDN}
 COLLABORATION_APP_INSECURE=false
 COLLABORATION_HTTP_ADDR=0.0.0.0:9300
 COLLABORATION_WOPI_SRC=https://${WOPI_HOST}