diff --git a/progress.go b/progress.go
index d411f3a..4bbb8b3 100644
--- a/progress.go
+++ b/progress.go
@@ -254,7 +254,12 @@
 func (p *Progress) serve(s *pState, cw *cwriter.Writer) {
 	defer p.cwg.Done()
 
-	render := func() error { return s.render(cw) }
+	render := func() error {
+		if s.bHeap.Len() == 0 {
+			return nil
+		}
+		return s.render(cw)
+	}
 
 	refreshCh := s.newTicker(p.done)