diff --git a/lib/fs.js b/lib/fs.js
index b71cff6c67..8e7ae5d30f 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -464,7 +464,7 @@ fs.truncate = function(path, len, callback) {
 fs.truncateSync = function(path, len) {
   if (typeof path === 'number') {
     // legacy
-    return fs.ftruncateSync(path, len, callback);
+    return fs.ftruncateSync(path, len);
   }
   if (typeof len === 'undefined') {
     len = 0;