diff --git a/netjsonconfig/backends/openvpn/openvpn.py b/netjsonconfig/backends/openvpn/openvpn.py
index 65abde31d..2ab53ac1f 100644
--- a/netjsonconfig/backends/openvpn/openvpn.py
+++ b/netjsonconfig/backends/openvpn/openvpn.py
@@ -110,7 +110,6 @@ def auto_client(
             'cert',
             'key',
             'pkcs12',
-            'mtu_disc',
             'mtu_test',
             'fragment',
             'mssfix',