diff --git a/internal/control/control.go b/internal/control/control.go
index e4fcdf6..a947311 100644
--- a/internal/control/control.go
+++ b/internal/control/control.go
@@ -39,6 +39,7 @@ type Manager struct {
 	saved    *hub.Saved
 	stop     context.CancelFunc
 	username string
+	lastHub  string // the hub last signed in to, for signing in again after signing out
 	signin   *signin
 }
 
@@ -106,6 +107,9 @@ func (m *Manager) status() status {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	s := status{Hub: m.DefaultHub}
+	if m.lastHub != "" {
+		s.Hub = m.lastHub
+	}
 	if m.saved != nil {
 		s.SignedIn, s.Hub, s.Username = true, m.saved.URL, m.username
 	}
@@ -118,7 +122,7 @@ func (m *Manager) status() status {
 // SignIn starts signing in to a hub; the code to enter shows in the status, and the browser opens the page.
 func (m *Manager) SignIn(hubURL string) {
 	if hubURL == "" {
-		hubURL = m.DefaultHub
+		hubURL = m.status().Hub
 	}
 	ctx, cancel := context.WithCancel(context.Background())
 	si := &signin{running: true, cancel: cancel}
@@ -159,6 +163,9 @@ func (m *Manager) SignIn(hubURL string) {
 func (m *Manager) SignOut() {
 	m.mu.Lock()
 	c, stop := m.client, m.stop
+	if m.saved != nil {
+		m.lastHub = m.saved.URL
+	}
 	m.client, m.saved, m.stop, m.username, m.signin = nil, nil, nil, "", nil
 	m.mu.Unlock()
 	if c != nil {
diff --git a/internal/control/control_test.go b/internal/control/control_test.go
index 63661a1..60bccfa 100644
--- a/internal/control/control_test.go
+++ b/internal/control/control_test.go
@@ -109,6 +109,11 @@ func TestSignInAndOut(t *testing.T) {
 	if _, err := os.Stat(path); !os.IsNotExist(err) {
 		t.Fatalf("hub.json: %v", err)
 	}
+	// Signing in again goes to the same hub.
+	m.DefaultHub = "https://elsewhere.test"
+	if s := ask(t, m, "GET", "/hub", ""); s.Hub != srv.URL {
+		t.Fatalf("hub after signing out: %q", s.Hub)
+	}
 
 	// Only https hubs (or this computer's); other requests to the proxy's address are refused.
 	u, _ := url.Parse("http://" + Host + "/hub/signin")