diff --git a/vlib/crypto/ed25519/internal/edwards25519/extra.v b/vlib/crypto/ed25519/internal/edwards25519/extra.v
index 56c53bf6dd..c6dd6a4dad 100644
--- a/vlib/crypto/ed25519/internal/edwards25519/extra.v
+++ b/vlib/crypto/ed25519/internal/edwards25519/extra.v
@@ -89,11 +89,11 @@ fn is_on_curve(x Element, y Element, z Element, t Element) bool {
 pub fn (mut v Point) bytes_montgomery() []u8 {
 	// This function is outlined to make the allocations inline in the caller
 	// rather than happen on the heap.
-	mut buf := [32]byte{}
+	mut buf := [32]u8{}
 	return v.bytes_montgomery_generic(mut buf)
 }
 
-fn (mut v Point) bytes_montgomery_generic(mut buf [32]byte) []u8 {
+fn (mut v Point) bytes_montgomery_generic(mut buf [32]u8) []u8 {
 	check_initialized(v)
 
 	// RFC 7748, Section 4.1 provides the bilinear map to calculate the
diff --git a/vlib/crypto/ed25519/internal/edwards25519/extra_test.v b/vlib/crypto/ed25519/internal/edwards25519/extra_test.v
index bad706515e..af492a9e40 100644
--- a/vlib/crypto/ed25519/internal/edwards25519/extra_test.v
+++ b/vlib/crypto/ed25519/internal/edwards25519/extra_test.v
@@ -23,7 +23,7 @@ fn testsuite_begin() {
 //
 // Disabled curve25519 not available yet, but maybe can use own curve25519
 /*
-fn fn_mon(scalar [32]byte) bool {
+fn fn_mon(scalar [32]u8) bool {
                mut s := new_scalar().set_bytes_with_clamping(scalar[..])
                p := (&Point{}).scalar_base_mult(s)
                got := p.bytes_montgomery()
@@ -32,7 +32,7 @@ fn fn_mon(scalar [32]byte) bool {
        }
 
 fn test_bytes_montgomery() {
-       /* f := fn(scalar [32]byte) bool {
+       /* f := fn(scalar [32]u8) bool {
                s := new_scalar().set_bytes_with_clamping(scalar[..])
                p := (&Point{}).scalar_base_mult(s)
                got := p.bytes_montgomery()
@@ -88,7 +88,7 @@ fn fn_cofactor(mut data []u8) bool {
 
 	// 8 * p == (8 * s) * B
 	mut sc := Scalar{
-		s: [32]byte{}
+		s: [32]u8{}
 	}
 	sc.s[0] = u8(0x08)
 	s.multiply(s, sc)
diff --git a/vlib/crypto/ed25519/internal/edwards25519/point.v b/vlib/crypto/ed25519/internal/edwards25519/point.v
index 5e3f645691..c3f1cc0021 100644
--- a/vlib/crypto/ed25519/internal/edwards25519/point.v
+++ b/vlib/crypto/ed25519/internal/edwards25519/point.v
@@ -204,11 +204,11 @@ fn (mut v AffineCached) zero() AffineCached {
 pub fn (mut v Point) bytes() []u8 {
 	// This function is outlined to make the allocations inline in the caller
 	// rather than happen on the heap.
-	mut buf := [32]byte{}
+	mut buf := [32]u8{}
 	return v.bytes_generic(mut buf)
 }
 
-fn (mut v Point) bytes_generic(mut buf [32]byte) []u8 {
+fn (mut v Point) bytes_generic(mut buf [32]u8) []u8 {
 	check_initialized(v)
 
 	mut zinv := Element{}
@@ -226,7 +226,7 @@ fn (mut v Point) bytes_generic(mut buf [32]byte) []u8 {
 	return out
 }
 
-fn copy_field_element(mut buf [32]byte, mut v Element) []u8 {
+fn copy_field_element(mut buf [32]u8, mut v Element) []u8 {
 	// this fail in test
 	/*
 	copy(mut buf[..], v.bytes())
diff --git a/vlib/crypto/ed25519/internal/edwards25519/scalar.v b/vlib/crypto/ed25519/internal/edwards25519/scalar.v
index 6cd411081b..eb90cc29e9 100644
--- a/vlib/crypto/ed25519/internal/edwards25519/scalar.v
+++ b/vlib/crypto/ed25519/internal/edwards25519/scalar.v
@@ -18,7 +18,7 @@ struct Scalar {
 mut:
 	// s is the Scalar value in little-endian. The value is always reduced
 	// between operations.
-	s [32]byte
+	s [32]u8
 }
 
 pub const (
@@ -210,7 +210,7 @@ fn load4(inp []u8) i64 {
 // Output:
 //   s[0]+256*s[1]+...+256^31*s[31] = (ab+c) mod l
 //   where l = 2^252 + 27742317777372353535851937790883648493.
-fn sc_mul_add(mut s [32]byte, a [32]byte, b [32]byte, c [32]byte) {
+fn sc_mul_add(mut s [32]u8, a [32]u8, b [32]u8, c [32]u8) {
 	a0 := 2097151 & load3(a[..])
 	a1 := 2097151 & (load4(a[2..]) >> 5)
 	a2 := 2097151 & (load3(a[5..]) >> 2)
@@ -653,7 +653,7 @@ fn sc_mul_add(mut s [32]byte, a [32]byte, b [32]byte, c [32]byte) {
 // Output:
 //   s[0]+256*s[1]+...+256^31*s[31] = s mod l
 //   where l = 2^252 + 27742317777372353535851937790883648493.
-fn sc_reduce(mut out [32]byte, mut s []u8) {
+fn sc_reduce(mut out [32]u8, mut s []u8) {
 	assert out.len == 32
 	assert s.len == 64
 	mut s0 := 2097151 & load3(s[..])
diff --git a/vlib/crypto/ed25519/internal/edwards25519/scalar_test.v b/vlib/crypto/ed25519/internal/edwards25519/scalar_test.v
index 09c80e6c82..5f8420b2e8 100644
--- a/vlib/crypto/ed25519/internal/edwards25519/scalar_test.v
+++ b/vlib/crypto/ed25519/internal/edwards25519/scalar_test.v
@@ -101,7 +101,7 @@ fn test_scalar_set_canonical_bytes_round_trip() ? {
 
 const (
 	sc_error = Scalar{
-		s: [32]byte{init: (u8(-1))}
+		s: [32]u8{init: (u8(-1))}
 	}
 )
 
diff --git a/vlib/crypto/md5/md5.v b/vlib/crypto/md5/md5.v
index 6a13f506bb..1b7cd28dc3 100644
--- a/vlib/crypto/md5/md5.v
+++ b/vlib/crypto/md5/md5.v
@@ -105,7 +105,7 @@ pub fn (mut d Digest) checksum() []u8 {
 	// 8 bytes representing the message length in bits.
 	//
 	// 1 byte end marker :: 0-63 padding bytes :: 8 byte length
-	// tmp := [1 + 63 + 8]byte{0x80}
+	// tmp := [1 + 63 + 8]u8{0x80}
 	mut tmp := []u8{len: (1 + 63 + 8)}
 	tmp[0] = 0x80
 	pad := ((55 - d.len) % 64) // calculate number of padding bytes
diff --git a/vlib/strconv/format_mem.c.v b/vlib/strconv/format_mem.c.v
index ea09b02027..44c9be8f24 100644
--- a/vlib/strconv/format_mem.c.v
+++ b/vlib/strconv/format_mem.c.v
@@ -81,7 +81,7 @@ pub fn format_dec_sb(d u64, p BF_param, mut res strings.Builder) {
 	/*
 	// Legacy version
 	// max u64 18446744073709551615 => 20 byte
-	mut buf := [32]byte{}
+	mut buf := [32]u8{}
 	mut i := 20
 	mut d1 := d
 	for i >= (21 - n_char) {
diff --git a/vlib/v/ast/table.v b/vlib/v/ast/table.v
index 39e1f94dae..34c985ae78 100644
--- a/vlib/v/ast/table.v
+++ b/vlib/v/ast/table.v
@@ -1407,7 +1407,7 @@ pub fn (mut t Table) complete_interface_check() {
 //
 // `128 > [16]u8`
 //
-// `608 > [76]byte`
+// `608 > [76]u8`
 pub fn (mut t Table) bitsize_to_type(bit_size int) Type {
 	match bit_size {
 		8 {
diff --git a/vlib/v/ast/types.v b/vlib/v/ast/types.v
index 1862b5cae7..63be8af531 100644
--- a/vlib/v/ast/types.v
+++ b/vlib/v/ast/types.v
@@ -950,7 +950,7 @@ pub mut:
 pub struct ArrayFixed {
 pub:
 	size      int
-	size_expr Expr // used by fmt for e.g. ´[my_const]byte´
+	size_expr Expr // used by fmt for e.g. ´[my_const]u8´
 pub mut:
 	elem_type Type
 }
diff --git a/vlib/v/checker/containers.v b/vlib/v/checker/containers.v
index 754b1ef6cd..ba8ce66916 100644
--- a/vlib/v/checker/containers.v
+++ b/vlib/v/checker/containers.v
@@ -177,7 +177,7 @@ pub fn (mut c Checker) array_init(mut node ast.ArrayInit) ast.Type {
 		}
 		node.elem_type = elem_type
 	} else if node.is_fixed && node.exprs.len == 1 && node.elem_type != ast.void_type {
-		// [50]byte
+		// [50]u8
 		mut fixed_size := i64(0)
 		init_expr := node.exprs[0]
 		c.expr(init_expr)
diff --git a/vlib/v/fmt/fmt.v b/vlib/v/fmt/fmt.v
index 5430241a55..5502b2d62c 100644
--- a/vlib/v/fmt/fmt.v
+++ b/vlib/v/fmt/fmt.v
@@ -1578,7 +1578,7 @@ pub fn (mut f Fmt) array_init(node ast.ArrayInit) {
 		f.indent--
 	}
 	f.write(']')
-	// `[100]byte`
+	// `[100]u8`
 	if node.is_fixed {
 		if node.has_val {
 			f.write('!')
diff --git a/vlib/v/gen/js/js.v b/vlib/v/gen/js/js.v
index 26821b9f99..be6d027cda 100644
--- a/vlib/v/gen/js/js.v
+++ b/vlib/v/gen/js/js.v
@@ -2119,7 +2119,7 @@ fn (mut g JsGen) gen_array_init_expr(it ast.ArrayInit) {
 		g.expr(it.len_expr)
 		g.write(')')
 	} else if it.is_fixed && it.exprs.len == 1 {
-		// [100]byte codegen
+		// [100]u8 codegen
 		t1 := g.new_tmp_var()
 		t2 := g.new_tmp_var()
 		g.writeln('(function() {')
diff --git a/vlib/v/parser/containers.v b/vlib/v/parser/containers.v
index beb6a40a21..f925f942b9 100644
--- a/vlib/v/parser/containers.v
+++ b/vlib/v/parser/containers.v
@@ -43,7 +43,7 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 		}
 		last_pos = p.tok.pos()
 	} else {
-		// [1,2,3] or [const]byte
+		// [1,2,3] or [const]u8
 		old_inside_array_lit := p.inside_array_lit
 		p.inside_array_lit = true
 		pre_cmnts = p.eat_comments()
@@ -66,7 +66,7 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 		last_pos = p.tok.pos()
 		p.check(.rsbr)
 		if exprs.len == 1 && p.tok.kind in [.name, .amp, .lsbr] && p.tok.line_nr == line_nr {
-			// [100]byte
+			// [100]u8
 			elem_type = p.parse_type()
 			last_pos = p.tok.pos()
 			is_fixed = true