diff --git a/quiche/quic/qbone/bonnet/tun_device_controller.cc b/quiche/quic/qbone/bonnet/tun_device_controller.cc
index fe9e2a0..0473bc6 100644
--- a/quiche/quic/qbone/bonnet/tun_device_controller.cc
+++ b/quiche/quic/qbone/bonnet/tun_device_controller.cc
@@ -16,8 +16,7 @@
           "qbone interface to the qbone table. This is unnecessary in "
           "environments with no other ipv6 route.");
 
-ABSL_FLAG(int, qbone_route_init_cwnd,
-          quic::NetlinkInterface::kUnspecifiedInitCwnd,
+ABSL_FLAG(int, qbone_route_init_cwnd, 32,
           "If non-zero, will add initcwnd to QBONE routing rules.  Setting "
           "a value below 10 is dangerous and not recommended.");