diff --git a/Running-Mastodon/Production-guide.md b/Running-Mastodon/Production-guide.md
index 54bf17b9..a023020f 100644
--- a/Running-Mastodon/Production-guide.md
+++ b/Running-Mastodon/Production-guide.md
@@ -166,6 +166,17 @@ In the prompt:
     CREATE USER mastodon CREATEDB;
     \q
 
+Under Ubuntu 16.04, you will need to explicitly enable ident authentication so that local users can connect to the database without a password:
+
+    sudo sed -i '/^local.*postgres.*peer$/a host    all     all     127.0.0.1/32    ident' /etc/postgresql/9.?/main/pg_hba.conf
+
+and install an ident daemon, which does not come installed by default:
+
+    sudo apt-get install pidentd
+    sudo systemctl enable pidentd
+    sudo systemctl start pidentd
+    sudo systemctl restart postgresql
+
 ## Rbenv
 
 It is recommended to use rbenv (exclusively from the `mastodon` user) to install the desired Ruby version. Follow the guides to [install rbenv][1] and [rbenv-build][2] (I recommend checking the [prerequisites][3] for your system on the rbenv-build project and installing them beforehand, obviously outside the unprivileged `mastodon` user)