diff --git a/dnsapi/dns_inwx.sh b/dnsapi/dns_inwx.sh
index afe2c465..d83e08d6 100755
--- a/dnsapi/dns_inwx.sh
+++ b/dnsapi/dns_inwx.sh
@@ -6,6 +6,7 @@ Docs: github.com/acmesh-official/acme.sh/wiki/dnsapi#dns_inwx
 Options:
  INWX_User Username
  INWX_Password Password
+ INWX_Shared_Secret 2 Factor Authentication Shared Secret (optional)
 '
 
 # Dependencies: