diff --git a/reseed/server.go b/reseed/server.go
index 5eb958e..883d921 100644
--- a/reseed/server.go
+++ b/reseed/server.go
@@ -80,7 +80,7 @@ func (s *Server) reseedHandler(w http.ResponseWriter, r *http.Request) {
 
 	su3Bytes, err := s.Reseeder.PeerSu3Bytes(peer)
 	if nil != err {
-		http.Error(w, "500 Unable to get SU3", http.StatusInternalServerError)
+		http.Error(w, "500 Unable to serve su3", http.StatusInternalServerError)
 		return
 	}
 
diff --git a/reseed/service.go b/reseed/service.go
index 42bd6a6..1e35fd1 100644
--- a/reseed/service.go
+++ b/reseed/service.go
@@ -3,6 +3,7 @@ package reseed
 import (
 	"crypto/rsa"
 	"crypto/sha256"
+	"errors"
 	"fmt"
 	"hash/crc32"
 	"io/ioutil"
@@ -199,6 +200,10 @@ func (rs *ReseederImpl) PeerSu3Bytes(peer Peer) ([]byte, error) {
 	m := <-rs.su3s
 	defer func() { rs.su3s <- m }()
 
+	if 0 == len(m) {
+		return nil, errors.New("404")
+	}
+
 	return m[peer.Hash()%len(m)], nil
 }