diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index 665f215ada..db447248e7 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -898,7 +898,9 @@ pub fn copy(mut dst []u8, src []u8) int {
 // reduce executes a given reducer function on each element of the array,
 // resulting in a single output value.
 // NOTE: It exists as a method on `[]int` types only.
-// See also `arrays.fold`.
+// See also `arrays.reduce` for same name or `arrays.fold` for same functionality.
+[deprecated: 'use arrays.fold instead, this function has less flexibility than arrays.fold']
+[deprecated_after: '2022-10-11']
 pub fn (a []int) reduce(iter fn (int, int) int, accum_start int) int {
 	mut accum_ := accum_start
 	for i in a {
diff --git a/vlib/v/gen/native/amd64.v b/vlib/v/gen/native/amd64.v
index e196659102..dd5bf243ab 100644
--- a/vlib/v/gen/native/amd64.v
+++ b/vlib/v/gen/native/amd64.v
@@ -1,5 +1,6 @@
 module native
 
+import arrays
 import v.ast
 import v.token
 
@@ -1675,12 +1676,12 @@ pub fn (mut g Gen) call_fn_amd64(node ast.CallExpr) {
 		}
 		stack_args << i
 	}
-	reg_size := reg_args.map((args_size[it] + 7) / 8).reduce(fn (a int, b int) int {
-		return a + b
-	}, 0)
-	stack_size := stack_args.map((args_size[it] + 7) / 8).reduce(fn (a int, b int) int {
-		return a + b
-	}, 0)
+	reg_size := arrays.fold(reg_args.map((args_size[it] + 7) / 8), 0, fn (acc int, elem int) int {
+		return acc + elem
+	})
+	stack_size := arrays.fold(stack_args.map((args_size[it] + 7) / 8), 0, fn (acc int, elem int) int {
+		return acc + elem
+	})
 
 	// not aligned now XOR pushed args will be odd
 	is_16bit_aligned := if mut g.code_gen is Amd64 { g.code_gen.is_16bit_aligned } else { true } != (stack_size % 2 == 1)