diff --git a/tun_linux.go b/tun_linux.go
index 15b6a29..09c9262 100644
--- a/tun_linux.go
+++ b/tun_linux.go
@@ -592,6 +592,7 @@ func (t *NativeTun) rules() []*netlink.Rule {
 			it = netlink.NewRule()
 			if t.options.InterfaceMonitor.OverrideAndroidVPN() {
 				it.Mark = protectedFromVPN
+				it.MarkSet = true
 			}
 			it.Mask = protectedFromVPN
 			it.Priority = priority
@@ -604,6 +605,7 @@ func (t *NativeTun) rules() []*netlink.Rule {
 			it = netlink.NewRule()
 			if t.options.InterfaceMonitor.OverrideAndroidVPN() {
 				it.Mark = protectedFromVPN
+				it.MarkSet = true
 			}
 			it.Mask = protectedFromVPN
 			it.Family = unix.AF_INET6