diff --git a/packages/data/single-file/src/define-properties.ts b/packages/data/single-file/src/define-properties.ts
index ec5b154..9af0137 100644
--- a/packages/data/single-file/src/define-properties.ts
+++ b/packages/data/single-file/src/define-properties.ts
@@ -1 +1,34 @@
-export { defineProperties as default } from '@nolyfill/shared';
+const defineProperty = (object: any, name: string | number | symbol, value: any, predicate: (() => boolean) | true | undefined) => {
+  if (name in object) {
+    if (predicate === true) {
+      if (object[name] === value) {
+        return;
+      }
+    } else if (
+      typeof predicate !== 'function'
+      || !predicate()
+    ) {
+      return;
+    }
+  }
+  Object.defineProperty(object, name, {
+    configurable: true,
+    enumerable: false,
+    value,
+    writable: true
+  });
+};
+
+const defineProperties = <M extends object>(
+  object: object,
+  map: M & ThisType<any>,
+  predicates?: Partial<Record<keyof M, () => boolean>>
+) => {
+  const props: Array<keyof M> = Array.prototype.concat.call(Object.keys(map), Object.getOwnPropertySymbols(map));
+  for (let i = 0, l = props.length; i < l; i++) {
+    const k = props[i];
+    defineProperty(object, k, map[k], predicates?.[k]);
+  }
+};
+
+export default defineProperties;
diff --git a/packages/generated/define-properties/index.js b/packages/generated/define-properties/index.js
index be806c6..dd1c0ad 100644
--- a/packages/generated/define-properties/index.js
+++ b/packages/generated/define-properties/index.js
@@ -1,2 +1,2 @@
-"use strict";Object.defineProperty(exports,"__esModule",{value:!0}),Object.defineProperty(exports,"default",{enumerable:!0,get:function(){return e.defineProperties}});const e=require("@nolyfill/shared");
+"use strict";Object.defineProperty(exports,"__esModule",{value:!0}),Object.defineProperty(exports,"default",{enumerable:!0,get:function(){return t}});const e=(e,t,r,n)=>{if(t in e){if(!0===n){if(e[t]===r)return}else if("function"!=typeof n||!n())return}Object.defineProperty(e,t,{configurable:!0,enumerable:!1,value:r,writable:!0})},t=(t,r,n)=>{let o=Array.prototype.concat.call(Object.keys(r),Object.getOwnPropertySymbols(r));for(let l=0,i=o.length;l<i;l++){let i=o[l];e(t,i,r[i],null==n?void 0:n[i])}};
 ((typeof exports.default === 'object' && exports.default !== null) || typeof exports.default === 'function') && (Object.assign(exports.default,exports), module.exports = exports.default);
diff --git a/packages/generated/define-properties/package.json b/packages/generated/define-properties/package.json
index 2aafee4..52334ad 100644
--- a/packages/generated/define-properties/package.json
+++ b/packages/generated/define-properties/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nolyfill/define-properties",
-  "version": "1.0.29",
+  "version": "1.0.39",
   "repository": {
     "type": "git",
     "url": "https://github.com/SukkaW/nolyfill",
diff --git a/packages/tools/shared/package.json b/packages/tools/shared/package.json
index f5ee8ed..d318620 100644
--- a/packages/tools/shared/package.json
+++ b/packages/tools/shared/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nolyfill/shared",
-  "version": "1.0.38",
+  "version": "1.0.39",
   "repository": {
     "type": "git",
     "url": "https://github.com/SukkaW/nolyfill",
diff --git a/packages/tools/shared/src/define-properties.ts b/packages/tools/shared/src/define-properties.ts
deleted file mode 100644
index eabf980..0000000
--- a/packages/tools/shared/src/define-properties.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-const defineProperty = (object: any, name: string | number | symbol, value: any, predicate: (() => boolean) | true | undefined) => {
-  if (name in object) {
-    if (predicate === true) {
-      if (object[name] === value) {
-        return;
-      }
-    } else if (
-      typeof predicate !== 'function'
-      || !predicate()
-    ) {
-      return;
-    }
-  }
-  Object.defineProperty(object, name, {
-    configurable: true,
-    enumerable: false,
-    value,
-    writable: true
-  });
-};
-export const defineProperties = <M extends object>(
-  object: object,
-  map: M & ThisType<any>,
-  predicates?: Partial<Record<keyof M, () => boolean>>
-) => {
-  const props: Array<keyof M> = Array.prototype.concat.call(Object.keys(map), Object.getOwnPropertySymbols(map));
-  for (let i = 0, l = props.length; i < l; i++) {
-    const k = props[i];
-    defineProperty(object, k, map[k], predicates?.[k]);
-  }
-};
diff --git a/packages/tools/shared/src/index.ts b/packages/tools/shared/src/index.ts
index 1e4bdd5..23f506a 100644
--- a/packages/tools/shared/src/index.ts
+++ b/packages/tools/shared/src/index.ts
@@ -1,5 +1,4 @@
 export { uncurryThis } from './uncurry-this';
 export { TypedArrayPrototype } from './typed-array-prototype';
-export { defineProperties } from './define-properties';
 export { makeEsShim } from './make-es-shim';
 export { defineEsShim } from './define-es-shim';
diff --git a/packages/tools/shared/src/make-es-shim.ts b/packages/tools/shared/src/make-es-shim.ts
index c35b400..987484e 100644
--- a/packages/tools/shared/src/make-es-shim.ts
+++ b/packages/tools/shared/src/make-es-shim.ts
@@ -4,30 +4,36 @@ export interface EsShimProp<I> {
   shim(): I
 }
 
+const GET_POLYFILL = 'getPolyfill';
+const SHIM = 'shim';
+const IMPLEMENTATION = 'implementation';
+
+const sharedDescriptor = {
+  configurable: true,
+  enumerable: false,
+  writable: true
+};
+
+const ObjectDefineProperty = Object.defineProperty;
+
 export function makeEsShim<T extends object, I>(shim: T, implementation: I): asserts shim is T & EsShimProp<I> {
   const getPolyfill = () => implementation;
-  if (!('implementation' in shim)) {
-    Object.defineProperty(shim, 'implementation', {
-      configurable: true,
-      enumerable: false,
+  if (!(IMPLEMENTATION in shim)) {
+    ObjectDefineProperty(shim, IMPLEMENTATION, {
       value: implementation,
-      writable: true
+      ...sharedDescriptor
     });
   }
-  if (!('getPolyfill' in shim)) {
-    Object.defineProperty(shim, 'getPolyfill', {
-      configurable: true,
-      enumerable: false,
+  if (!(GET_POLYFILL in shim)) {
+    ObjectDefineProperty(shim, GET_POLYFILL, {
       value: getPolyfill,
-      writable: true
+      ...sharedDescriptor
     });
   }
-  if (!('shim' in shim)) {
-    Object.defineProperty(shim, 'shim', {
-      configurable: true,
-      enumerable: false,
+  if (!(SHIM in shim)) {
+    ObjectDefineProperty(shim, SHIM, {
       value: getPolyfill,
-      writable: true
+      ...sharedDescriptor
     });
   }
 }
diff --git a/packages/tools/shared/src/typed-array-prototype.ts b/packages/tools/shared/src/typed-array-prototype.ts
index 143a499..cd9ae6e 100644
--- a/packages/tools/shared/src/typed-array-prototype.ts
+++ b/packages/tools/shared/src/typed-array-prototype.ts
@@ -1 +1 @@
-export const TypedArrayPrototype = Object.getPrototypeOf(Uint8Array.prototype) as Uint8Array;
+export const TypedArrayPrototype = Object.getPrototypeOf(Int8Array.prototype) as Int8Array;