diff --git a/install/opencloud-install.sh b/install/opencloud-install.sh
index 1f64a21c6..5c7997e99 100644
--- a/install/opencloud-install.sh
+++ b/install/opencloud-install.sh
@@ -196,7 +196,7 @@ EOF
 $STD sudo -u cool coolconfig set ssl.enable false
 $STD sudo -u cool coolconfig set ssl.termination true
 $STD sudo -u cool coolconfig set ssl.ssl_verification true
-sed -i "s|CSP2\"/>|CSP2\">frame-ancestors https://${OC_HOST}</content_security_policy>|" /etc/coolwsd/coolwsd.xml
+sed -i "s|CSP2\"/>|CSP2\">frame-ancestors https://${OPENCLOUD_FQDN}</content_security_policy>|" /etc/coolwsd/coolwsd.xml
 useradd -r -M -s /usr/sbin/nologin opencloud
 chown -R opencloud:opencloud "$CONFIG_DIR" "$DATA_DIR"
 sudo -u opencloud opencloud init --config-path "$CONFIG_DIR" --insecure no