diff --git a/tailcfg/tailcfg.go b/tailcfg/tailcfg.go
index 4907feb51..2274d3cf4 100644
--- a/tailcfg/tailcfg.go
+++ b/tailcfg/tailcfg.go
@@ -31,10 +31,11 @@ import (
 //     5: 2020-10-19, implies IncludeIPv6, delta Peers/UserProfiles, supports MagicDNS
 //     6: 2020-12-07: means MapResponse.PacketFilter nil means unchanged
 //     7: 2020-12-15: FilterRule.SrcIPs accepts CIDRs+ranges, doesn't warn about 0.0.0.0/::
-//     8: 2020-12-19: client can receive IPv6 addresses and routes if beta enabled server-side
+//     8: 2020-12-19: client can buggily receive IPv6 addresses and routes if beta enabled server-side
 //     9: 2020-12-30: client doesn't auto-add implicit search domains from peers; only DNSConfig.Domains
 //    10: 2021-01-17: client understands MapResponse.PeerSeenChange
-const CurrentMapRequestVersion = 10
+//    11: 2021-03-03: client understands IPv6 and multiple nodes with default routes
+const CurrentMapRequestVersion = 11
 
 type StableID string