diff --git a/provisioner/shell/unix_reader.go b/provisioner/shell/unix_reader.go
index 52b83eddd..1e4ea76a1 100644
--- a/provisioner/shell/unix_reader.go
+++ b/provisioner/shell/unix_reader.go
@@ -57,5 +57,5 @@ func scanUnixLine(data []byte, atEOF bool) (advance int, token []byte, err error
 	if advance == 0 {
 		return
 	}
-	return advance, append(token, "\n"...), err
+	return advance, append(token, '\n'), err
 }