diff --git a/install/opencloud-install.sh b/install/opencloud-install.sh
index 298e28438..675a4eff1 100644
--- a/install/opencloud-install.sh
+++ b/install/opencloud-install.sh
@@ -99,7 +99,7 @@ PROXY_TLS=false
 PROXY_CSP_CONFIG_FILE_LOCATION=${CONFIG_DIR}/csp.yaml
 
 ## Collaboration - requires VALID TLS
-COLLABORA_DOMAIN=${COLLABORA_HOST}
+COLLABORA_DOMAIN=${COLLABORA_FQDN}
 COLLABORATION_APP_NAME="CollaboraOnline"
 COLLABORATION_APP_PRODUCT="Collabora"
 COLLABORATION_APP_ADDR=https://${COLLABORA_HOST}