diff --git a/common/buf/reader.go b/common/buf/reader.go
index 02450bc3c..49e37bab7 100644
--- a/common/buf/reader.go
+++ b/common/buf/reader.go
@@ -90,8 +90,6 @@ type BufferedReader struct {
 	Reader Reader
 	// Buffer is the internal buffer to be read from first
 	Buffer MultiBuffer
-	// Direct indicates whether or not to use the internal buffer
-	Direct bool
 }
 
 // BufferedBytes returns the number of bytes that is cached in this reader.
@@ -118,12 +116,6 @@ func (r *BufferedReader) Read(b []byte) (int, error) {
 		return nBytes, nil
 	}
 
-	if r.Direct {
-		if reader, ok := r.Reader.(io.Reader); ok {
-			return reader.Read(b)
-		}
-	}
-
 	mb, err := r.Reader.ReadMultiBuffer()
 	if err != nil {
 		return 0, err
diff --git a/common/crypto/auth.go b/common/crypto/auth.go
index f860577e1..dc158f0cc 100644
--- a/common/crypto/auth.go
+++ b/common/crypto/auth.go
@@ -104,7 +104,6 @@ func NewAuthenticationReader(auth Authenticator, sizeParser ChunkSizeDecoder, re
 		sizeBytes:    make([]byte, sizeParser.SizeBytes()),
 	}
 	if breader, ok := reader.(*buf.BufferedReader); ok {
-		breader.Direct = false
 		r.reader = breader
 	} else {
 		r.reader = &buf.BufferedReader{Reader: buf.NewReader(reader)}
diff --git a/proxy/shadowsocks/protocol.go b/proxy/shadowsocks/protocol.go
index 836d08941..ce6681956 100644
--- a/proxy/shadowsocks/protocol.go
+++ b/proxy/shadowsocks/protocol.go
@@ -103,8 +103,6 @@ func ReadTCPSession(user *protocol.User, reader io.Reader) (*protocol.RequestHea
 		return nil, nil, newError("invalid remote address.")
 	}
 
-	br.Direct = true
-
 	var chunkReader buf.Reader
 	if request.Option.Has(RequestOptionOneTimeAuth) {
 		chunkReader = NewChunkReader(br, NewAuthenticator(ChunkKeyGenerator(iv)))
diff --git a/proxy/shadowsocks/server.go b/proxy/shadowsocks/server.go
index c6dc8b41f..0c390b06d 100644
--- a/proxy/shadowsocks/server.go
+++ b/proxy/shadowsocks/server.go
@@ -171,8 +171,6 @@ func (s *Server) handleConnection(ctx context.Context, conn internet.Connection,
 	}
 	conn.SetReadDeadline(time.Time{})
 
-	bufferedReader.Direct = true
-
 	dest := request.Destination()
 	log.Record(&log.AccessMessage{
 		From:   conn.RemoteAddr(),
diff --git a/proxy/vmess/outbound/outbound.go b/proxy/vmess/outbound/outbound.go
index fe278304e..1612f7035 100644
--- a/proxy/vmess/outbound/outbound.go
+++ b/proxy/vmess/outbound/outbound.go
@@ -160,7 +160,6 @@ func (v *Handler) Process(ctx context.Context, link *core.Link, dialer proxy.Dia
 		}
 		v.handleCommand(rec.Destination(), header.Command)
 
-		reader.Direct = true
 		bodyReader := session.DecodeResponseBody(request, reader)
 
 		return buf.Copy(bodyReader, output, buf.UpdateActivity(timer))