diff --git a/src/openvpn/options.c b/src/openvpn/options.c
index 53be6f5..3753810 100644
--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -3579,6 +3579,7 @@
             {
                 msg(M_WARN, "WARNING: couldn't copy all --dns server addresses to TUN/TAP");
             }
+            tt->dhcp_options |= DHCP_OPTIONS_DHCP_OPTIONAL;
             return;
         }
     }