diff --git a/user_manual/user_2fa.rst b/user_manual/user_2fa.rst
index d4f85b3dd..92bc822ef 100644
--- a/user_manual/user_2fa.rst
+++ b/user_manual/user_2fa.rst
@@ -85,6 +85,7 @@ You can use two-factor authentication based on hardware tokens. The following de
 *    FIDO2 based:
 
      *    `Nitrokey FIDO2 <https://shop.nitrokey.com/shop/product/nkfi2-nitrokey-fido2-55>`_
+     *    `Nitrokey FIDO U2F <https://shop.nitrokey.com/shop/product/nitrokey-fido-u2f-20>`_
 
 Using client applications with two-factor authentication
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