diff --git a/lib/fs.js b/lib/fs.js
index 6f8e3b73650..aa0792b24b5 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -167,7 +167,7 @@ fs.readFile = function(path, encoding_) {
     fs.close(fd, function(er) {
       if (size === 0) {
         // collected the data into the buffers list.
-        buffer = Buffer.concat(buffer.length, pos);
+        buffer = Buffer.concat(buffers, pos);
       }
 
       if (encoding) buffer = buffer.toString(encoding);