diff --git a/netdata/trunk/PKGBUILD b/netdata/trunk/PKGBUILD
index a89c773147c..12a87da07f9 100644
--- a/netdata/trunk/PKGBUILD
+++ b/netdata/trunk/PKGBUILD
@@ -14,6 +14,7 @@ optdepends=('nodejs: for monitoring named and SNMP devices'
             'lm_sensors: for monitoring hardware sensors'
             'iproute2: for monitoring Linux QoS'
             'python: for most of the external plugins'
+            'python-mysqlclient: for monitoring MySQL/MariaDB databases'
             'python-psycopg2: for monitoring PostgreSQL databases'
             'python-requests: for monitoring elasticsearch'
             'hddtemp: for monitoring hhd temperature'