diff --git a/templates/sshd_config/Debian_squeeze.erb b/templates/sshd_config/Debian_squeeze.erb
index 56b1cab..d371ed1 100644
--- a/templates/sshd_config/Debian_squeeze.erb
+++ b/templates/sshd_config/Debian_squeeze.erb
@@ -202,3 +202,7 @@ AllowGroups <%= sshd_allowed_groups %>
 <%= sshd_tail_additional_options %>
 <%- end %>
 
+<%- if sshd_perfect_forward_secrecy.to_s == 'yes' then -%>
+Ciphers aes256-ctr
+MACs hmac-sha1
+<%- end %>