diff --git a/lib/timers.js b/lib/timers.js
index 72f275a6421..102a927a19c 100644
--- a/lib/timers.js
+++ b/lib/timers.js
@@ -229,24 +229,40 @@ exports.clearTimeout = function(timer) {
 };
 
 
-exports.setInterval = function(callback, repeat, arg1, arg2, arg3) {
+exports.setInterval = function(callback, repeat) {
   repeat *= 1; // coalesce to number or NaN
 
   if (!(repeat >= 1 && repeat <= TIMEOUT_MAX)) {
     repeat = 1; // schedule on next tick, follows browser behaviour
   }
 
-  var args, i;
   var timer = new Timeout(repeat);
-  var len = arguments.length - 2;
-  timer._onTimeout = wrapper;
-  timer._repeat = true;
-  // Initialize args once for repeated invocation of slow case below
-  if (len > 3) {
-    args = new Array(len);
-    for (i = 0; i < len; i++)
-      args[i] = arguments[i + 2];
+  var length = arguments.length;
+  var ontimeout = callback;
+  switch (length) {
+    case 0:
+    case 1:
+    case 2:
+      break;
+    case 3:
+      ontimeout = callback.bind(timer, arguments[2]);
+      break;
+    case 4:
+      ontimeout = callback.bind(timer, arguments[2], arguments[3]);
+      break;
+    case 5:
+      ontimeout =
+          callback.bind(timer, arguments[2], arguments[3], arguments[4]);
+      break;
+    default:
+      var args = new Array(length - 2);
+      for (var i = 2; i < length; i += 1)
+        args[i - 2] = arguments[i];
+      ontimeout = callback.apply.bind(callback, timer, args);
+      break;
   }
+  timer._onTimeout = wrapper;
+  timer._repeat = ontimeout;
 
   if (process.domain) timer.domain = process.domain;
   exports.active(timer);
@@ -254,27 +270,9 @@ exports.setInterval = function(callback, repeat, arg1, arg2, arg3) {
   return timer;
 
   function wrapper() {
-    switch (len) {
-      // fast cases
-      case 0:
-        callback.call(this);
-        break;
-      case 1:
-        callback.call(this, arg1);
-        break;
-      case 2:
-        callback.call(this, arg1, arg2);
-        break;
-      case 3:
-        callback.call(this, arg1, arg2, arg3);
-        break;
-      // slow case
-      default:
-        callback.apply(this, args);
-        break;
-    }
+    timer._repeat.call(this);
     // If callback called clearInterval().
-    if (timer._repeat === false) return;
+    if (timer._repeat === null) return;
     // If timer is unref'd (or was - it's permanently removed from the list.)
     if (this._handle) {
       this._handle.start(repeat, 0);