diff --git a/wgengine/magicsock/relaymanager.go b/wgengine/magicsock/relaymanager.go
index 9f1fbbceb..779be75dd 100644
--- a/wgengine/magicsock/relaymanager.go
+++ b/wgengine/magicsock/relaymanager.go
@@ -51,6 +51,7 @@ func (r *relayManager) initLocked() {
 	}
 	r.discoInfoByServerDisco = make(map[key.DiscoPublic]*discoInfo)
 	r.serversByAddrPort = make(map[netip.AddrPort]key.DiscoPublic)
+	r.relaySetupWorkByEndpoint = make(map[*endpoint]*relaySetupWork)
 }
 
 // discoInfo returns a [*discoInfo] for 'serverDisco' if there is an