diff --git a/reference/ssh2/functions/ssh2-auth-pubkey-file.xml b/reference/ssh2/functions/ssh2-auth-pubkey-file.xml
index b0958910cc..942f5bb07e 100644
--- a/reference/ssh2/functions/ssh2-auth-pubkey-file.xml
+++ b/reference/ssh2/functions/ssh2-auth-pubkey-file.xml
@@ -45,6 +45,10 @@
      <term><parameter>pubkeyfile</parameter></term>
      <listitem>
       <para>
+       The public key file needs to be in OpenSSH's format. It should look something like:
+      </para>
+      <para>
+       ssh-rsa AAAAB3NzaC1yc2EAAA....NX6sqSnHA8= rsa-key-20121110
       </para>
      </listitem>
     </varlistentry>