diff --git a/docs/rolereference.rst b/docs/rolereference.rst
index 4de9d7324db515bdbe5b719a9270b4a78d125ebf..970ad716a5701c977b1fafbd0843fde6ab08d31a 100644
--- a/docs/rolereference.rst
+++ b/docs/rolereference.rst
@@ -1930,6 +1930,13 @@ The role implements the following:
 * Installs MariaDB server and client.
 * Configures MariaDB server and client to use *UTF-8* encoding by default.
 * Sets password for the database root user.
+
+.. note::
+   On Debian Stretch it is possible to login into the database through
+   Unix socket as ``root`` operating system account as well - relying
+   on Unix socket user authentication without providing password. This
+   is the default set-up of MariaDB server on Debian Stretch
+
 * Deploys MariaDB client configuration in location ``/root/.my.cnf`` that
   contains username and password for the root database user.