diff --git a/examples/tcp_server_benchmark/main.mbt b/examples/tcp_server_benchmark/main.mbt
index 5a0202f02..9b148ba65 100644
--- a/examples/tcp_server_benchmark/main.mbt
+++ b/examples/tcp_server_benchmark/main.mbt
@@ -109,7 +109,7 @@ async fn main {
   let conn_duration = @string.parse_int(conn_duration_str)
   let addr = @socket.Addr::parse(addr_str)
   let rand = {
-    let seed = @buffer.new()
+    let seed = Buffer()
     let now = @env.now()
     seed
     ..write_uint64_le(now)
diff --git a/src/fs/tmpdir.mbt b/src/fs/tmpdir.mbt
index 8632ee8e1..a8cec49f8 100644
--- a/src/fs/tmpdir.mbt
+++ b/src/fs/tmpdir.mbt
@@ -14,7 +14,7 @@
 
 ///|
 let tmpdir_seed : @random.Rand = {
-  let seed = @buffer.new()
+  let seed = Buffer()
   let now = @async.now()
   for _ in 0..<4 {
     seed.write_int64_le(now)
diff --git a/src/http/send.mbt b/src/http/send.mbt
index 4bcd6e951..9d054424c 100644
--- a/src/http/send.mbt
+++ b/src/http/send.mbt
@@ -43,7 +43,7 @@ fn[W : @io.Writer] Sender::new(
   w : W,
   headers? : Map[String, String] = {},
 ) -> Sender {
-  let header_text = @buffer.new()
+  let header_text = Buffer()
   let mut has_accept_encoding = false
   for k, v in headers {
     let k_lower = k.to_lower()