diff --git a/pkg/broadcastwriter/broadcastwriter.go b/pkg/broadcastwriter/broadcastwriter.go
index 1d3c3c5f15..2ee68944d1 100644
--- a/pkg/broadcastwriter/broadcastwriter.go
+++ b/pkg/broadcastwriter/broadcastwriter.go
@@ -51,7 +51,7 @@ func (w *BroadcastWriter) Write(p []byte) (n int, err error) {
 	for {
 		line, err := w.buf.ReadString('\n')
 		if err != nil {
-			w.buf.Write([]byte(line))
+			w.buf.WriteString(line)
 			break
 		}
 		for stream, writers := range w.streams {