diff --git a/dnsapi/dns_inwx.sh b/dnsapi/dns_inwx.sh
index cd5af91b..f4590cf8 100755
--- a/dnsapi/dns_inwx.sh
+++ b/dnsapi/dns_inwx.sh
@@ -158,7 +158,8 @@ _inwx_login() {
export _H1
#https://github.com/inwx/php-client/blob/master/INWX/Domrobot.php#L71
- if _contains "$response" "tfa"; then
+ if _contains "$response" "code1000" \
+ && _contains "$response" "tfaGOOGLE-AUTH"; then
if [ -z "$INWX_Shared_Secret" ]; then
_err "Mobile TAN detected."
_err "Please define a shared secret."