4 files changed, 6 insertions, 7 deletions
diff --git a/src/Angular.js b/src/Angular.js
index f876dde0..d698aa11 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -64,7 +64,6 @@ var _undefined        = undefined,
     $console          = 'console',
     $date             = 'date',
     $display          = 'display',
-    $function         = 'function',
     $length           = 'length',
     $name             = 'name',
     $noop             = 'noop',
@@ -420,7 +419,7 @@ function isArray(value) { return value instanceof Array; }
  * @param {*} value Reference to check.
  * @returns {boolean} True if `value` is a `Function`.
  */
-function isFunction(value){ return typeof value == $function;}
+function isFunction(value){ return typeof value == 'function';}
 
 
 /**
@@ -819,7 +818,7 @@ function sliceArgs(args, startIndex) {
  */
 function bind(self, fn) {
   var curryArgs = arguments.length > 2 ? sliceArgs(arguments, 2) : [];
-  if (typeof fn == $function && !(fn instanceof RegExp)) {
+  if (isFunction(fn) && !(fn instanceof RegExp)) {
     return curryArgs.length
       ? function() {
           return arguments.length
diff --git a/src/JSON.js b/src/JSON.js
index b0f72a1b..02c1a613 100644
--- a/src/JSON.js
+++ b/src/JSON.js
@@ -136,7 +136,7 @@ function toJsonArray(buf, obj, pretty, stack) {
       for ( var keyIndex = 0; keyIndex < keys.length; keyIndex++) {
         var key = keys[keyIndex];
         var value = obj[key];
-        if (typeof value != $function) {
+        if (!isFunction(value)) {
           if (comma) {
             buf.push(",");
             if (pretty) buf.push(pretty);
diff --git a/src/apis.js b/src/apis.js
index 8a566a46..3a9671a8 100644
--- a/src/apis.js
+++ b/src/apis.js
@@ -394,7 +394,7 @@ var angularArray = {
           }
         }
         break;
-      case $function:
+      case 'function':
         predicates.push(expression);
         break;
       default:
diff --git a/src/parser.js b/src/parser.js
index 9f2442de..dadab1fb 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -515,7 +515,7 @@ function parser(text, json){
       if (instance)
         instance = instance[key];
     }
-    if (typeof instance != $function) {
+    if (!isFunction(instance)) {
       throwError("should be a function", token);
     }
     return instance;
@@ -765,7 +765,7 @@ function compileExpr(expr) {
 // TODO(misko): Deprecate? Remove!
 // I think that compilation should be a service.
 function expressionCompile(exp) {
-  if (typeof exp === $function) return exp;
+  if (isFunction(exp)) return exp;
   var fn = compileCache[exp];
   if (!fn) {
     fn = compileCache[exp] =  parser(exp).statements();