diff --git a/examples/buf_reader.v b/examples/buf_reader.v
index 5e1770b293..e754f61cdb 100644
--- a/examples/buf_reader.v
+++ b/examples/buf_reader.v
@@ -9,7 +9,7 @@ fn main() {
 	// Simple http HEAD request for a file
 	conn.write_string('GET /index.html HTTP/1.0\r\n\r\n') ?
 	// Wrap in a buffered reader
-	mut r := io.new_buffered_reader(reader: io.make_reader(conn))
+	mut r := io.new_buffered_reader(reader: conn)
 	for {
 		l := r.read_line() or { break }
 		println('$l')
diff --git a/vlib/io/custom_string_reading_test.v b/vlib/io/custom_string_reading_test.v
index 7a1212a84c..76e3307395 100644
--- a/vlib/io/custom_string_reading_test.v
+++ b/vlib/io/custom_string_reading_test.v
@@ -28,7 +28,7 @@ fn read_from_string(text string, capacity int) []byte {
 	mut str := StringReader{
 		text: text
 	}
-	mut stream := io.new_buffered_reader(reader: io.make_reader(str), cap: capacity)
+	mut stream := io.new_buffered_reader(reader: str, cap: capacity)
 	//
 	mut buf := []byte{len: 1}
 	mut res := []byte{}
diff --git a/vlib/io/os_file_reader_test.v b/vlib/io/os_file_reader_test.v
index 409845f9f4..1ed3a1f7f4 100644
--- a/vlib/io/os_file_reader_test.v
+++ b/vlib/io/os_file_reader_test.v
@@ -7,7 +7,7 @@ fn read_file(file string, cap int) []string {
 	defer {
 		f.close()
 	}
-	mut r := io.new_buffered_reader(reader: io.make_reader(f), cap: cap)
+	mut r := io.new_buffered_reader(reader: f, cap: cap)
 	for {
 		l := r.read_line() or { break }
 		lines << l
diff --git a/vlib/io/reader.v b/vlib/io/reader.v
index a3e89d8105..b7377b0872 100644
--- a/vlib/io/reader.v
+++ b/vlib/io/reader.v
@@ -13,6 +13,8 @@ pub interface Reader {
 // (e.g. for use in struct initialisation)
 // (this shouldnt need to be a thing but until coercion gets made better
 // it is required)
+[deprecated: 'use just `x` instead of `io.make_reader(x)`. Interfaces are now checked against all types.']
+[deprecated_after: '2021-05-27']
 pub fn make_reader(r Reader) Reader {
 	return r
 }
diff --git a/vlib/io/reader_test.v b/vlib/io/reader_test.v
index 8622c79bac..c7a2265af9 100644
--- a/vlib/io/reader_test.v
+++ b/vlib/io/reader_test.v
@@ -62,7 +62,7 @@ fn test_stringreader() {
 	mut s := StringReader{
 		text: text
 	}
-	mut r := new_buffered_reader(reader: make_reader(s))
+	mut r := new_buffered_reader(reader: s)
 	for i := 0; true; i++ {
 		if _ := r.read_line() {
 		} else {
@@ -87,7 +87,7 @@ fn test_stringreader2() {
 	mut s := StringReader{
 		text: text
 	}
-	mut r := new_buffered_reader(reader: make_reader(s))
+	mut r := new_buffered_reader(reader: s)
 	for i := 0; true; i++ {
 		if _ := r.read_line() {
 		} else {
@@ -98,7 +98,7 @@ fn test_stringreader2() {
 	if _ := r.read_line() {
 		assert false
 	}
-	leftover := read_all(reader: make_reader(r)) or {
+	leftover := read_all(reader: r) or {
 		assert false
 		panic('bad')
 	}
@@ -112,7 +112,7 @@ fn test_leftover() {
 	mut s := StringReader{
 		text: text
 	}
-	mut r := new_buffered_reader(reader: make_reader(s))
+	mut r := new_buffered_reader(reader: s)
 	_ := r.read_line() or {
 		assert false
 		panic('bad')
diff --git a/vlib/net/ftp/ftp.v b/vlib/net/ftp/ftp.v
index f27ebb537a..41b2cde70c 100644
--- a/vlib/net/ftp/ftp.v
+++ b/vlib/net/ftp/ftp.v
@@ -103,7 +103,7 @@ fn (mut zftp FTP) read() ?(int, string) {
 
 pub fn (mut zftp FTP) connect(ip string) ?bool {
 	zftp.conn = net.dial_tcp('$ip:21') ?
-	zftp.reader = io.new_buffered_reader(reader: io.make_reader(zftp.conn))
+	zftp.reader = io.new_buffered_reader(reader: zftp.conn)
 	code, _ := zftp.read() ?
 	if code == ftp.connected {
 		return true
@@ -184,7 +184,7 @@ fn new_dtp(msg string) ?&DTP {
 	}
 	conn := net.dial_tcp('$ip:$port') or { return error('Cannot connect to the data channel') }
 	dtp.conn = conn
-	dtp.reader = io.new_buffered_reader(reader: io.make_reader(dtp.conn))
+	dtp.reader = io.new_buffered_reader(reader: dtp.conn)
 	return dtp
 }
 
diff --git a/vlib/net/smtp/smtp.v b/vlib/net/smtp/smtp.v
index 1755bb9c33..50c537c62e 100644
--- a/vlib/net/smtp/smtp.v
+++ b/vlib/net/smtp/smtp.v
@@ -71,7 +71,7 @@ pub fn (mut c Client) reconnect() ? {
 	conn := net.dial_tcp('$c.server:$c.port') or { return error('Connecting to server failed') }
 	c.conn = conn
 
-	c.reader = io.new_buffered_reader(reader: io.make_reader(c.conn))
+	c.reader = io.new_buffered_reader(reader: c.conn)
 
 	c.expect_reply(.ready) or { return error('Received invalid response from server') }
 	c.send_ehlo() or { return error('Sending EHLO packet failed') }
diff --git a/vlib/net/tcp_read_line.v b/vlib/net/tcp_read_line.v
index c76db99fd1..38e24f9585 100644
--- a/vlib/net/tcp_read_line.v
+++ b/vlib/net/tcp_read_line.v
@@ -9,13 +9,13 @@ const (
 // read_line is a *simple*, *non customizable*, blocking line reader.
 // It will *always* return a line, ending with CRLF, or just '', on EOF.
 // NB: if you want more control over the buffer, please use a buffered IO
-// reader instead: `io.new_buffered_reader({reader: io.make_reader(con)})`
+// reader instead: `io.new_buffered_reader(reader: con)`
 pub fn (mut con TcpConn) read_line() string {
-	mut buf := [max_read]byte{} // where C.recv will store the network data
+	mut buf := [net.max_read]byte{} // where C.recv will store the network data
 	mut res := '' // The final result, including the ending \n.
 	for {
 		mut line := '' // The current line. Can be a partial without \n in it.
-		n := C.recv(con.sock.handle, &buf[0], max_read - 1, msg_peek | msg_nosignal)
+		n := C.recv(con.sock.handle, &buf[0], net.max_read - 1, net.msg_peek | msg_nosignal)
 		if n == -1 {
 			return res
 		}
@@ -48,7 +48,7 @@ pub fn (mut con TcpConn) read_line() string {
 		// recv returned a buffer without \n in it .
 		C.recv(con.sock.handle, &buf[0], n, msg_nosignal)
 		res += line
-		res += crlf
+		res += net.crlf
 		break
 	}
 	return res
diff --git a/vlib/net/tcp_simple_client_server_test.v b/vlib/net/tcp_simple_client_server_test.v
index 321ed04579..4c95cfa242 100644
--- a/vlib/net/tcp_simple_client_server_test.v
+++ b/vlib/net/tcp_simple_client_server_test.v
@@ -19,9 +19,9 @@ fn setup() (&net.TcpListener, &net.TcpConn, &net.TcpConn) {
 }
 
 fn cleanup(mut server net.TcpListener, mut client net.TcpConn, mut socket net.TcpConn) {
-	server.close() or { }
-	client.close() or { }
-	socket.close() or { }
+	server.close() or {}
+	client.close() or {}
+	socket.close() or {}
 }
 
 fn test_socket() {
@@ -74,9 +74,7 @@ fn test_socket_write_and_read() {
 
 fn test_socket_read_line() {
 	mut server, mut client, mut socket := setup()
-	mut reader := io.new_buffered_reader(
-		reader: io.make_reader(client)
-	)
+	mut reader := io.new_buffered_reader(reader: client)
 	defer {
 		cleanup(mut server, mut client, mut socket)
 	}
@@ -108,7 +106,7 @@ fn test_socket_write_fail_without_panic() {
 	// ensure that socket.write (i.e. done on the server side)
 	// continues to work, even when the client side has been disconnected
 	// this test is important for a stable long standing server
-	client.close() or { }
+	client.close() or {}
 	$if solaris {
 		return
 	}
@@ -123,9 +121,7 @@ fn test_socket_write_fail_without_panic() {
 
 fn test_socket_read_line_long_line_without_eol() {
 	mut server, mut client, mut socket := setup()
-	mut reader := io.new_buffered_reader(
-		reader: io.make_reader(client)
-	)
+	mut reader := io.new_buffered_reader(reader: client)
 	defer {
 		cleanup(mut server, mut client, mut socket)
 	}
diff --git a/vlib/vweb/request_test.v b/vlib/vweb/request_test.v
index b935a2e2e9..d39637e20e 100644
--- a/vlib/vweb/request_test.v
+++ b/vlib/vweb/request_test.v
@@ -20,7 +20,11 @@ fn (mut s StringReader) read(mut buf []byte) ?int {
 }
 
 fn reader(s string) &io.BufferedReader {
-	return io.new_buffered_reader(reader: io.make_reader(&StringReader{ text: s }))
+	return io.new_buffered_reader(
+		reader: &StringReader{
+			text: s
+		}
+	)
 }
 
 fn test_parse_request_not_http() {
diff --git a/vlib/vweb/vweb.v b/vlib/vweb/vweb.v
index 0d6f762205..6d0b034027 100644
--- a/vlib/vweb/vweb.v
+++ b/vlib/vweb/vweb.v
@@ -337,7 +337,7 @@ fn handle_conn<T>(mut conn net.TcpConn, mut app T) {
 	defer {
 		conn.close() or {}
 	}
-	mut reader := io.new_buffered_reader(reader: io.make_reader(conn))
+	mut reader := io.new_buffered_reader(reader: conn)
 	defer {
 		reader.free()
 	}