diff --git a/lib/fs.js b/lib/fs.js
index 3deb3090fd9731..64978efb9d0b2c 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -1098,7 +1098,7 @@ function writeAll(fd, buffer, offset, length, position, callback_) {
   fs.write(fd, buffer, offset, length, position, function(writeErr, written) {
     if (writeErr) {
       fs.close(fd, function() {
-        if (callback) callback(writeErr);
+        callback(writeErr);
       });
     } else {
       if (written === length) {
@@ -1131,7 +1131,7 @@ fs.writeFile = function(path, data, options, callback_) {
   var flag = options.flag || 'w';
   fs.open(path, flag, options.mode, function(openErr, fd) {
     if (openErr) {
-      if (callback) callback(openErr);
+      callback(openErr);
     } else {
       var buffer = (data instanceof Buffer) ? data : new Buffer('' + data,
           options.encoding || 'utf8');