diff --git a/_examples/progressAsWriter/main.go b/_examples/progressAsWriter/main.go
index 543843c..9b9fbb9 100644
--- a/_examples/progressAsWriter/main.go
+++ b/_examples/progressAsWriter/main.go
@@ -15,7 +15,7 @@
 	total, numBars := 100, 2
 	var wg sync.WaitGroup
 	wg.Add(numBars)
-	done := make(chan struct{})
+	done := make(chan interface{})
 	p := mpb.New(
 		mpb.WithWidth(64),
 		mpb.WithWaitGroup(&wg),