diff --git a/vlib/builtin/array.v b/vlib/builtin/array.v
index 78591e8852..ea4278fe0c 100644
--- a/vlib/builtin/array.v
+++ b/vlib/builtin/array.v
@@ -251,3 +251,13 @@ pub fn (b []byte) hex() string {
 	}
 	return string(hex)
 }
+
+// TODO: implement for all types
+pub fn copy(dst, src []byte) int {
+	if dst.len > 0 && src.len > 0 {
+		min := if dst.len < src.len { dst.len } else { src.len }
+		C.memcpy(dst.data, src.left(min).data, dst.element_size*min)
+		return min
+	}
+	return 0
+}