diff --git a/bar.go b/bar.go
index 88f80b3..ec8409b 100644
--- a/bar.go
+++ b/bar.go
@@ -86,7 +86,7 @@
 		noPop:        bs.noPop,
 		operateState: make(chan func(*bState)),
 		frameCh:      make(chan io.Reader, 1),
-		syncTableCh:  make(chan [][]chan int),
+		syncTableCh:  make(chan [][]chan int, 1),
 		completed:    make(chan bool, 1),
 		done:         make(chan struct{}),
 		cancel:       cancel,