diff --git a/lib/stream.js b/lib/stream.js
index 826f0e6d9adb6c..725038ba9c0d1c 100644
--- a/lib/stream.js
+++ b/lib/stream.js
@@ -21,9 +21,9 @@
 
 'use strict';
 
-const { Buffer } = require('buffer');
 const pipeline = require('internal/streams/pipeline');
 const eos = require('internal/streams/end-of-stream');
+const internalBuffer = require('internal/buffer');
 
 // Note: export Stream before Readable/Writable/Duplex/...
 // to avoid a cross-reference(require) issues
@@ -42,24 +42,8 @@ Stream.finished = eos;
 Stream.Stream = Stream;
 
 Stream._isUint8Array = require('internal/util/types').isUint8Array;
-
-const version = process.version.substr(1).split('.');
-if (version[0] === 0 && version[1] < 12) {
-  Stream._uint8ArrayToBuffer = Buffer;
-} else {
-  try {
-    const internalBuffer = require('internal/buffer');
-    Stream._uint8ArrayToBuffer = function _uint8ArrayToBuffer(chunk) {
-      return new internalBuffer.FastBuffer(chunk.buffer,
-                                           chunk.byteOffset,
-                                           chunk.byteLength);
-    };
-  } catch (e) { // eslint-disable-line no-unused-vars
-  }
-
-  if (!Stream._uint8ArrayToBuffer) {
-    Stream._uint8ArrayToBuffer = function _uint8ArrayToBuffer(chunk) {
-      return Buffer.prototype.slice.call(chunk);
-    };
-  }
-}
+Stream._uint8ArrayToBuffer = function _uint8ArrayToBuffer(chunk) {
+  return new internalBuffer.FastBuffer(chunk.buffer,
+                                       chunk.byteOffset,
+                                       chunk.byteLength);
+};