diff --git a/doc/api/buffer.md b/doc/api/buffer.md
index 4712957658df78..0301eadd3bebdc 100644
--- a/doc/api/buffer.md
+++ b/doc/api/buffer.md
@@ -907,7 +907,7 @@ const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
 console.log(buf2.toString());
 ```
 
-A `TypeError` will be thrown if `str` is not a string.
+A `TypeError` will be thrown if `string` is not a string.
 
 ### Class Method: Buffer.from(object[, offsetOrEncoding[, length]])
 <!-- YAML