diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index 89c6cc6db0..25f80eaa79 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -167,7 +167,7 @@ fn (a array) get(i int) voidptr {
 			panic('array.get: index out of range (i == $i, a.len == $a.len)')
 		}
 	}
-	return a.data + i * a.element_size
+	return byteptr(a.data) + i * a.element_size
 }
 
 // array.first returns the first element of the array
@@ -177,7 +177,7 @@ pub fn (a array) first() voidptr {
 			panic('array.first: array is empty')
 		}
 	}
-	return a.data + 0
+	return a.data
 }
 
 // array.last returns the last element of the array
@@ -187,7 +187,7 @@ pub fn (a array) last() voidptr {
 			panic('array.last: array is empty')
 		}
 	}
-	return a.data + (a.len - 1) * a.element_size
+	return byteptr(a.data) + (a.len - 1) * a.element_size
 }
 
 /*
@@ -242,7 +242,7 @@ fn (a array) slice(start, _end int) array {
 	l := end - start
 	res := array{
 		element_size: a.element_size
-		data: a.data + start * a.element_size
+		data: byteptr(a.data) + start * a.element_size
 		len: l
 		cap: l
 	}
@@ -267,7 +267,7 @@ pub fn (a &array) clone() array {
 		element_size: a.element_size
 		data: vcalloc(size)
 	}
-	C.memcpy(arr.data, a.data, a.cap * a.element_size)
+	C.memcpy(byteptr(arr.data), a.data, a.cap * a.element_size)
 	return arr
 }
 
@@ -287,7 +287,7 @@ fn (a &array) slice_clone(start, _end int) array {
 	l := end - start
 	res := array{
 		element_size: a.element_size
-		data: a.data + start * a.element_size
+		data: byteptr(a.data) + start * a.element_size
 		len: l
 		cap: l
 	}
@@ -301,12 +301,12 @@ fn (a mut array) set(i int, val voidptr) {
 			panic('array.set: index out of range (i == $i, a.len == $a.len)')
 		}
 	}
-	C.memcpy(a.data + a.element_size * i, val, a.element_size)
+	C.memcpy(byteptr(a.data) + a.element_size * i, val, a.element_size)
 }
 
 fn (a mut array) push(val voidptr) {
 	a.ensure_cap(a.len + 1)
-	C.memcpy(a.data + a.element_size * a.len, val, a.element_size)
+	C.memcpy(byteptr(a.data) + a.element_size * a.len, val, a.element_size)
 	a.len++
 }
 
@@ -318,10 +318,10 @@ pub fn (a3 mut array) push_many(val voidptr, size int) {
 		copy := a3.clone()
 		a3.ensure_cap(a3.len + size)
 		//C.memcpy(a.data, copy.data, copy.element_size * copy.len)
-		C.memcpy(a3.data + a3.element_size * a3.len, copy.data, a3.element_size * size)
+		C.memcpy(byteptr(a3.data) + a3.element_size * a3.len, copy.data, a3.element_size * size)
 	} else {
 		a3.ensure_cap(a3.len + size)
-		C.memcpy(a3.data + a3.element_size * a3.len, val, a3.element_size * size)
+		C.memcpy(byteptr(a3.data) + a3.element_size * a3.len, val, a3.element_size * size)
 	}
 	a3.len += size
 }
@@ -340,7 +340,7 @@ pub fn (a array) reverse() array {
 	}
 	for i in 0..a.len {
 		//C.memcpy(arr.data + i * arr.element_size, &a[a.len - 1 - i], arr.element_size)
-		C.memcpy(arr.data + i * arr.element_size, a.data + (a.len - 1 - i) * arr.element_size, arr.element_size)
+		C.memcpy(byteptr(arr.data) + i * arr.element_size, byteptr(a.data) + (a.len - 1 - i) * arr.element_size, arr.element_size)
 	}
 	return arr
 }
@@ -436,7 +436,7 @@ pub fn copy(dst, src []byte) int {
 	if dst.len > 0 && src.len > 0 {
 		mut min := 0
 		min = if dst.len < src.len { dst.len } else { src.len }
-		C.memcpy(dst.data, src[..min].data, dst.element_size * min)
+		C.memcpy(byteptr(dst.data), src[..min].data, dst.element_size * min)
 		return min
 	}
 	return 0
@@ -607,7 +607,7 @@ pub fn compare_f32(a, b &f32) int {
 pub fn (a array) pointers() []voidptr {
 	mut res := []voidptr
 	for i in 0..a.len {
-		res << a.data + i * a.element_size
+		res << byteptr(a.data) + i * a.element_size
 	}
 	return res
 }
diff --git a/vlib/builtin/builtin_windows.v b/vlib/builtin/builtin_windows.v
index 647060ceb2..9487b1291b 100644
--- a/vlib/builtin/builtin_windows.v
+++ b/vlib/builtin/builtin_windows.v
@@ -84,18 +84,18 @@ $if msvc {
 	frames := int( C.CaptureStackBackTrace(skipframes + 1, 100, backtraces, 0) )
 	for i:=0; i < frames; i++ {
 		// fugly pointer arithmetics follows ...
-		s := *voidptr( u64(backtraces) + u64(i*sizeof(voidptr)) )
-		symfa_ok := C.SymFromAddr( handle, *s, &offset, si )
+		s := voidptr( u64(backtraces) + u64(i*sizeof(voidptr)) )
+		symfa_ok := C.SymFromAddr( handle, s, &offset, si )
 		if symfa_ok == 1 {
 			nframe := frames - i - 1
 			mut lineinfo := ''
-			symglfa_ok := C.SymGetLineFromAddr64(handle, *s, &offset, &sline64)
+			symglfa_ok := C.SymGetLineFromAddr64(handle, s, &offset, &sline64)
 			if symglfa_ok == 1 {
 				lineinfo = ' ${sline64.f_file_name}:${sline64.f_line_number}'
 			}
 			else {
 				//cerr := int(C.GetLastError()) println('SymGetLineFromAddr64 failure: $cerr ')
-				lineinfo = ' ?? : address= $s'
+				lineinfo = ' ?? : address= ${&s}'
 			}
 			sfunc := tos3(fname)
 			println('${nframe:-2d}: ${sfunc:-25s}  $lineinfo')
diff --git a/vlib/builtin/map.v b/vlib/builtin/map.v
index 2c49247c4d..7d602ede56 100644
--- a/vlib/builtin/map.v
+++ b/vlib/builtin/map.v
@@ -175,7 +175,7 @@ fn new_map(n, value_bytes int) map {
 fn new_map_init(n, value_bytes int, keys &string, values voidptr) map {
 	mut out := new_map(n, value_bytes)
 	for i in 0 .. n {
-		out.set(keys[i], values + i * value_bytes)
+		out.set(keys[i], byteptr(values) + i * value_bytes)
 	}
 	return out
 }
diff --git a/vlib/builtin/sorted_map.v b/vlib/builtin/sorted_map.v
index 49db24a6c4..0ece0177f7 100644
--- a/vlib/builtin/sorted_map.v
+++ b/vlib/builtin/sorted_map.v
@@ -48,7 +48,7 @@ fn new_sorted_map(n, value_bytes int) SortedMap { // TODO: Remove `n`
 fn new_sorted_map_init(n, value_bytes int, keys &string, values voidptr) SortedMap {
 	mut out := new_sorted_map(n, value_bytes)
 	for i in 0 .. n {
-		out.set(keys[i], values + i * value_bytes)
+		out.set(keys[i], byteptr(values) + i * value_bytes)
 	}
 	return out
 }