diff --git a/doc/api/fs.markdown b/doc/api/fs.markdown
index 60b1b984b7ad9f..6fdea6f7f0edf4 100644
--- a/doc/api/fs.markdown
+++ b/doc/api/fs.markdown
@@ -1342,7 +1342,7 @@ The synchronous version of [`fs.writeFile()`][]. Returns `undefined`.
 ## fs.writeSync(fd, data[, position[, encoding]])
 
 * `fd` {Integer}
-* `buffer` {String | Buffer}
+* `data` {String | Buffer}
 * `position` {Integer}
 * `encoding` {String}