diff --git a/packages/x-fetch/src/node.ts b/packages/x-fetch/src/node.ts
index 5b352538a..dcf911ca8 100644
--- a/packages/x-fetch/src/node.ts
+++ b/packages/x-fetch/src/node.ts
@@ -30,4 +30,4 @@ async function nodeFetch (...args: Parameters<typeof fetch>): Promise<Response>
   return modFn(...args);
 }
 
-export const fetch = extractGlobal('fetch', nodeFetch);
+export const fetch = /*#__PURE__*/ extractGlobal('fetch', nodeFetch);
diff --git a/packages/x-textdecoder/src/browser.ts b/packages/x-textdecoder/src/browser.ts
index f3098f748..40589c722 100644
--- a/packages/x-textdecoder/src/browser.ts
+++ b/packages/x-textdecoder/src/browser.ts
@@ -7,4 +7,4 @@ import { TextDecoder as Fallback } from './fallback';
 
 export { packageInfo } from './packageInfo';
 
-export const TextDecoder = extractGlobal('TextDecoder', Fallback);
+export const TextDecoder = /*#__PURE__*/ extractGlobal('TextDecoder', Fallback);
diff --git a/packages/x-textdecoder/src/node.ts b/packages/x-textdecoder/src/node.ts
index 296866f1d..2814e312a 100644
--- a/packages/x-textdecoder/src/node.ts
+++ b/packages/x-textdecoder/src/node.ts
@@ -7,4 +7,4 @@ import { extractGlobal } from '@polkadot/x-global';
 
 export { packageInfo } from './packageInfo';
 
-export const TextDecoder = extractGlobal('TextDecoder', util.TextDecoder);
+export const TextDecoder = /*#__PURE__*/ extractGlobal('TextDecoder', util.TextDecoder);
diff --git a/packages/x-textencoder/src/browser.ts b/packages/x-textencoder/src/browser.ts
index 6f79f97e0..057eea729 100644
--- a/packages/x-textencoder/src/browser.ts
+++ b/packages/x-textencoder/src/browser.ts
@@ -7,4 +7,4 @@ import { TextEncoder as Fallback } from './fallback';
 
 export { packageInfo } from './packageInfo';
 
-export const TextEncoder = extractGlobal('TextEncoder', Fallback);
+export const TextEncoder = /*#__PURE__*/ extractGlobal('TextEncoder', Fallback);
diff --git a/packages/x-textencoder/src/node.ts b/packages/x-textencoder/src/node.ts
index 4fa1c0fdb..0302521fe 100644
--- a/packages/x-textencoder/src/node.ts
+++ b/packages/x-textencoder/src/node.ts
@@ -20,4 +20,4 @@ class Fallback {
   }
 }
 
-export const TextEncoder = extractGlobal('TextEncoder', Fallback);
+export const TextEncoder = /*#__PURE__*/ extractGlobal('TextEncoder', Fallback);
diff --git a/packages/x-ws/src/node.ts b/packages/x-ws/src/node.ts
index 27160202a..abea3ebb9 100644
--- a/packages/x-ws/src/node.ts
+++ b/packages/x-ws/src/node.ts
@@ -7,4 +7,4 @@ import { extractGlobal } from '@polkadot/x-global';
 
 export { packageInfo } from './packageInfo';
 
-export const WebSocket = extractGlobal('WebSocket', ws.w3cwebsocket);
+export const WebSocket = /*#__PURE__*/ extractGlobal('WebSocket', ws.w3cwebsocket);