diff --git a/bar.go b/bar.go
index 6ce975a..8505a99 100644
--- a/bar.go
+++ b/bar.go
@@ -267,7 +267,7 @@
 	}
 }
 
-func (b *Bar) render(debugOut io.Writer, tw int) {
+func (b *Bar) render(tw int) {
 	if b.bpanic != nil {
 		b.toShutdown = false
 		b.frameCh <- b.panicToFrame(tw)
diff --git a/progress.go b/progress.go
index 98893c2..30294f5 100644
--- a/progress.go
+++ b/progress.go
@@ -253,7 +253,7 @@
 	}
 	for i := 0; i < s.bHeap.Len(); i++ {
 		bar := (*s.bHeap)[i]
-		go bar.render(s.debugOut, tw)
+		go bar.render(tw)
 	}
 
 	return s.flush(cw)