diff --git a/doc/api/buffer.md b/doc/api/buffer.md
index 29eec8fca171dd..e7f71079dc6798 100644
--- a/doc/api/buffer.md
+++ b/doc/api/buffer.md
@@ -743,6 +743,14 @@ added: v0.1.101
 
 Returns `true` if `obj` is a `Buffer`, `false` otherwise.
 
+```js
+Buffer.isBuffer(Buffer.alloc(10)); // true
+Buffer.isBuffer(Buffer.from('foo')); // true
+Buffer.isBuffer('a string'); // false
+Buffer.isBuffer([]); // false
+Buffer.isBuffer(new Uint8Array(1024)); // false
+```
+
 ### Static method: `Buffer.isEncoding(encoding)`
 <!-- YAML
 added: v0.9.1