diff --git a/server/server.go b/server/server.go
index 6fbf693..92b097b 100755
--- a/server/server.go
+++ b/server/server.go
@@ -158,7 +158,7 @@ func (s *Server) Pre(foo http.HandlerFunc) http.HandlerFunc {
 			log.Printf("failed to lookup auth for %s (%s): %v", r.Host, mapKey(r.Host), err)
 			w.Header().Set("WWW-Authenticate", "Basic")
 			http.Error(w, err.Error(), http.StatusUnauthorized)
-		} else if _, p, _ := r.BasicAuth(); auth != p {
+		} else if _, p, _ := r.BasicAuth(); auth != "" && auth != p {
 			log.Printf("failed to auth: expected %q but got %q", auth, p)
 			w.Header().Set("WWW-Authenticate", "Basic")
 			http.Error(w, "unexpected basic auth", http.StatusUnauthorized)