diff --git a/dnscrypt-proxy/plugin_block_undelegated.go b/dnscrypt-proxy/plugin_block_undelegated.go
index bb7838bc..487d08b7 100644
--- a/dnscrypt-proxy/plugin_block_undelegated.go
+++ b/dnscrypt-proxy/plugin_block_undelegated.go
@@ -119,6 +119,7 @@ var undelegatedSet = []string{
 	"envoy",
 	"example",
 	"f.f.ip6.arpa",
+	"fritz.box",
 	"grp",
 	"gw==",
 	"home",