diff --git a/docs/changelog.txt b/docs/changelog.txt
index b5cdce2..e765ea6 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -2,6 +2,8 @@ changelog
 
 -- v
 
++ Default robots.txt.
+
 ++ A new xzone to view and import data not otherwise visible.
 
 ++ Preview before honking.
diff --git a/honk.go b/honk.go
index 136df98..61f5c22 100644
--- a/honk.go
+++ b/honk.go
@@ -1315,6 +1315,14 @@ func servefile(w http.ResponseWriter, r *http.Request) {
 	w.Write(data)
 }
 
+func nomoroboto(w http.ResponseWriter, r *http.Request) {
+	io.WriteString(w, "User-agent: *\n")
+	io.WriteString(w, "Disallow: /t\n")
+	for _, u := range allusers() {
+		fmt.Fprintf(w, "Disallow: /u/%s/h/\n", u.Username)
+	}
+}
+
 func serve() {
 	db := opendatabase()
 	login.Init(db)
@@ -1356,6 +1364,7 @@ func serve() {
 	getters := mux.Methods("GET").Subrouter()
 
 	getters.HandleFunc("/", homepage)
+	getters.HandleFunc("/robots.txt", nomoroboto)
 	getters.HandleFunc("/rss", showrss)
 	getters.HandleFunc("/u/{name:[[:alnum:]]+}", showuser)
 	getters.HandleFunc("/u/{name:[[:alnum:]]+}/h/{xid:[[:alnum:]]+}", showhonk)