diff --git a/assembly/utils.ts b/assembly/utils.ts
index f647bb8..23cbe4a 100644
--- a/assembly/utils.ts
+++ b/assembly/utils.ts
@@ -2,9 +2,6 @@ import { CharCode } from "util/string";
 import { u128 } from "./integer/u128";
 import { u256 } from "./integer/u256";
 
-// @ts-ignore: decorator
-@lazy const HEX_CHARS = '0123456789abcdef';
-
 // @ts-ignore: decorator
 @lazy const MaxBaseForExponent128: u64[] = [
   u64.MAX_VALUE,       // 0