diff --git a/conf/mattermost.conf.sample b/conf/mattermost.conf.sample
index e72a0bf..40cd305 100644
--- a/conf/mattermost.conf.sample
+++ b/conf/mattermost.conf.sample
@@ -42,6 +42,17 @@ FQHN_HOSTNAME=""
 #MATTERMOST_BASE_INSTALL_PATH="/opt"
 
 
+# DB_TYPE
+#
+# Type of Mattermost database
+#
+# Possible values are 'pgsql' (PostgeSQL) or 'mysql' (MySQL)
+#
+# Defaults to POSTFIX_DB_TYPE="pgsql"
+#
+# DB_TYPE="pgsql"
+
+
 # MYSQL_CREDENTIAL_ARGS
 #
 # Giving password on command line is insecure an sind mysql 5.5