diff --git a/vlib/os/file_test.v b/vlib/os/file_test.v
index 4403f7f603..4e8616a966 100644
--- a/vlib/os/file_test.v
+++ b/vlib/os/file_test.v
@@ -66,7 +66,8 @@ fn test_write_struct() ? {
 	f.write_struct(another_point) ?
 	f.close()
 	x := os.read_file(tfile) ?
-	y := unsafe { byteptr(memdup(&another_point, size_of_point)).vstring_with_len(size_of_point) }
+	pcopy := unsafe { &byte(memdup(&another_point, size_of_point)) }
+	y := unsafe { pcopy.vstring_with_len(size_of_point) }
 	assert x == y
 	$if debug {
 		eprintln(x.bytes())
@@ -120,7 +121,8 @@ fn test_write_raw() ? {
 	f.write_raw(another_point) ?
 	f.close()
 	x := os.read_file(tfile) ?
-	y := unsafe { byteptr(memdup(&another_point, size_of_point)).vstring_with_len(size_of_point) }
+	pcopy := unsafe { &byte(memdup(&another_point, size_of_point)) }
+	y := unsafe { pcopy.vstring_with_len(size_of_point) }
 	assert x == y
 	$if debug {
 		eprintln(x.bytes())
diff --git a/vlib/os/os_android.c.v b/vlib/os/os_android.c.v
index acca881023..30825ea89e 100644
--- a/vlib/os/os_android.c.v
+++ b/vlib/os/os_android.c.v
@@ -10,7 +10,7 @@ struct C.ANativeActivity {
 	assetManager voidptr
 }
 
-fn C.AAssetManager_open(&C.AAssetManager, charptr, int) &C.AAsset
+fn C.AAssetManager_open(&C.AAssetManager, &char, int) &C.AAsset
 
 fn C.AAsset_getLength(&C.AAsset) int
 
diff --git a/vlib/os/os_windows.c.v b/vlib/os/os_windows.c.v
index a7573eeca7..5b190383b6 100644
--- a/vlib/os/os_windows.c.v
+++ b/vlib/os/os_windows.c.v
@@ -64,7 +64,7 @@ mut:
 	dw_flags           u32
 	w_show_window      u16
 	cb_reserved2       u16
-	lp_reserved2       byteptr
+	lp_reserved2       &byte
 	h_std_input        voidptr
 	h_std_output       voidptr
 	h_std_error        voidptr
@@ -77,7 +77,7 @@ mut:
 	b_inherit_handle       bool
 }
 
-fn init_os_args_wide(argc int, argv &byteptr) []string {
+fn init_os_args_wide(argc int, argv &&byte) []string {
 	mut args_ := []string{}
 	for i in 0 .. argc {
 		args_ << unsafe { string_from_wide(&u16(argv[i])) }
@@ -258,6 +258,7 @@ pub fn execute(cmd string) Result {
 	}
 	proc_info := ProcessInformation{}
 	start_info := StartupInfo{
+		lp_reserved2: 0
 		lp_reserved: 0
 		lp_desktop: 0
 		lp_title: 0
diff --git a/vlib/os/process_windows.c.v b/vlib/os/process_windows.c.v
index 47f359de78..bcdf971cf3 100644
--- a/vlib/os/process_windows.c.v
+++ b/vlib/os/process_windows.c.v
@@ -3,13 +3,13 @@ module os
 import strings
 
 fn C.GenerateConsoleCtrlEvent(event u32, pgid u32) bool
-fn C.GetModuleHandleA(name charptr) HMODULE
-fn C.GetProcAddress(handle voidptr, procname byteptr) voidptr
+fn C.GetModuleHandleA(name &char) HMODULE
+fn C.GetProcAddress(handle voidptr, procname &byte) voidptr
 fn C.TerminateProcess(process HANDLE, exit_code u32) bool
 
 type FN_NTSuspendResume = fn (voidptr)
 
-fn ntdll_fn(name charptr) FN_NTSuspendResume {
+fn ntdll_fn(name &char) FN_NTSuspendResume {
 	ntdll := C.GetModuleHandleA(c'NTDLL')
 	if ntdll == 0 {
 		return FN_NTSuspendResume(0)
@@ -66,6 +66,7 @@ fn (mut p Process) win_spawn_process() int {
 	}
 	p.wdata = voidptr(wdata)
 	mut start_info := StartupInfo{
+		lp_reserved2: 0
 		lp_reserved: 0
 		lp_desktop: 0
 		lp_title: 0
diff --git a/vlib/strings/builder.js.v b/vlib/strings/builder.js.v
index 7b224c48ef..e445804f75 100644
--- a/vlib/strings/builder.js.v
+++ b/vlib/strings/builder.js.v
@@ -37,7 +37,8 @@ pub fn (mut b Builder) writeln(s string) {
 }
 
 pub fn (b Builder) str() string {
-	return unsafe { byteptr(b.buf.data).vstring_with_len(b.len) }
+	x := &byte(b.buf.data)
+	return unsafe { x.vstring_with_len(b.len) }
 }
 
 pub fn (mut b Builder) cut(n int) {
diff --git a/vlib/v/ast/ast.v b/vlib/v/ast/ast.v
index e91574067e..0e1657e54f 100644
--- a/vlib/v/ast/ast.v
+++ b/vlib/v/ast/ast.v
@@ -1605,7 +1605,8 @@ pub fn (node Node) position() token.Position {
 		StructField {
 			return node.pos.extend(node.type_pos)
 		}
-		MatchBranch, SelectBranch, EnumField, ConstField, StructInitField, GlobalField, CallArg {
+		MatchBranch, SelectBranch, EnumField, ConstField, StructInitField, GlobalField, CallArg
+		 {
 			return node.pos
 		}
 		IfBranch {
diff --git a/vlib/v/tests/type_voidptr_test.v b/vlib/v/tests/type_voidptr_test.v
index 265e7f647a..2ea5765828 100644
--- a/vlib/v/tests/type_voidptr_test.v
+++ b/vlib/v/tests/type_voidptr_test.v
@@ -1,7 +1,7 @@
 [unsafe]
 fn memcpy(mut dest voidptr, src voidptr, len u32) voidptr {
-	mut d := byteptr(dest)
-	s := byteptr(src)
+	mut d := unsafe { &byte(dest) }
+	s := unsafe { &byte(src) }
 	mut l := len
 	for l > 0 {
 		l--