diff --git a/doc/api/fs.markdown b/doc/api/fs.markdown
index 18f12d9584..437ba732f8 100644
--- a/doc/api/fs.markdown
+++ b/doc/api/fs.markdown
@@ -357,7 +357,8 @@ Returns a new ReadStream object (See `Readable Stream`).
       encoding: null,
       fd: null,
       mode: 0666,
-      bufferSize: 4096 }
+      bufferSize: 64 * 1024
+    }
 
 `options` can include `start` and `end` values to read a range of bytes from
 the file instead of the entire file.  Both `start` and `end` are inclusive and