diff --git a/bar.go b/bar.go
index 8a73d23..f08d111 100644
--- a/bar.go
+++ b/bar.go
@@ -58,8 +58,8 @@
 	extender          extenderFunc
 	debugOut          io.Writer
 
-	// afterBar is a key for (*pState).queueBars
-	afterBar *Bar
+	afterBar *Bar // key for (*pState).queueBars
+	sync     bool
 }
 
 type frame struct {
@@ -300,6 +300,9 @@
 
 func (b *Bar) serve(ctx context.Context, bs *bState) {
 	defer b.container.bwg.Done()
+	if bs.afterBar != nil && bs.sync {
+		<-bs.afterBar.done
+	}
 	for {
 		select {
 		case op := <-b.operateState:
diff --git a/bar_option.go b/bar_option.go
index b62dba7..8599f0a 100644
--- a/bar_option.go
+++ b/bar_option.go
@@ -60,14 +60,16 @@
 }
 
 // BarQueueAfter puts this (being constructed) bar into the queue.
-// Queued bar will run after argument bar completes, replacing its
-// place. While bar is queued all of its methods are blocked.
-func BarQueueAfter(bar *Bar) BarOption {
+// When argument bar completes or aborts queued bar replaces its place.
+// If sync is true queued bar is suspended until argument bar completes
+// or aborts.
+func BarQueueAfter(bar *Bar, sync bool) BarOption {
 	if bar == nil {
 		return nil
 	}
 	return func(s *bState) {
 		s.afterBar = bar
+		s.sync = sync
 	}
 }