diff --git a/doc/Yubikey_and_SSH_via_PAM.adoc b/doc/Yubikey_and_SSH_via_PAM.adoc
index 4f0536d..a3813c5 100644
--- a/doc/Yubikey_and_SSH_via_PAM.adoc
+++ b/doc/Yubikey_and_SSH_via_PAM.adoc
@@ -156,7 +156,7 @@ The _pam_unix.so_ module used for authentication is generally located into
 `/etc/pam.d/common-auth` for Debian based Linux systems.
 
 ==== SSH configuration ====
----------------------
+
 Edit the sshd configuration file `/etc/ssh/sshd_config`_ to disable challenge-
 response passwords. Change `challenge-response passwords yes` to
 `challenge-response passwords no`.