diff --git a/doc/api/buffer.md b/doc/api/buffer.md
index ae0182aea5..d7e29966bc 100644
--- a/doc/api/buffer.md
+++ b/doc/api/buffer.md
@@ -2328,6 +2328,8 @@ The transcoding process will use substitution characters if a given byte
 sequence cannot be adequately represented in the target encoding. For instance:
 
 ```js
+const buffer = require('buffer');
+
 const newBuf = buffer.transcode(Buffer.from('€'), 'utf8', 'ascii');
 console.log(newBuf.toString('ascii'));
 // Prints: '?'