diff --git a/build.js b/build.js
index 10e7aa384..0e99c29fa 100755
--- a/build.js
+++ b/build.js
@@ -584,12 +584,19 @@
 
     var source = [
       ';(function(window) {',
-      "  var freeExports = typeof exports == 'object' && typeof require == 'function' && exports;",
+      '  var undefined;',
       '',
-      "  var freeModule = typeof module == 'object' && module && module.exports == freeExports && module;",
+      '  var objectTypes = {',
+      "    'function': true,",
+      "    'object': true",
+      '  };',
       '',
-      "  var freeGlobal = typeof global == 'object' && global;",
-      '  if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {',
+      "  var freeExports = objectTypes[typeof exports] && typeof require == 'function' && exports;",
+      '',
+      "  var freeModule = objectTypes[typeof module] && module && module.exports == freeExports && module;",
+      '',
+      "  var freeGlobal = objectTypes[typeof global] && global;",
+      '  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {',
       '    window = freeGlobal;',
       '  }',
       '',
diff --git a/lodash.js b/lodash.js
index a11c7d3a5..c74a96f1d 100644
--- a/lodash.js
+++ b/lodash.js
@@ -11,18 +11,6 @@
   /** Used as a safe reference for `undefined` in pre ES5 environments */
   var undefined;
 
-  /** Detect free variable `exports` */
-  var freeExports = typeof exports == 'object' && exports;
-
-  /** Detect free variable `module` */
-  var freeModule = typeof module == 'object' && module && module.exports == freeExports && module;
-
-  /** Detect free variable `global`, from Node.js or Browserified code, and use it as `window` */
-  var freeGlobal = typeof global == 'object' && global;
-  if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
-    window = freeGlobal;
-  }
-
   /** Used to pool arrays and objects used internally */
   var arrayPool = [],
       objectPool = [];
@@ -146,6 +134,18 @@
     '\u2029': 'u2029'
   };
 
+  /** Detect free variable `exports` */
+  var freeExports = objectTypes[typeof exports] && exports;
+
+  /** Detect free variable `module` */
+  var freeModule = objectTypes[typeof module] && module && module.exports == freeExports && module;
+
+  /** Detect free variable `global`, from Node.js or Browserified code, and use it as `window` */
+  var freeGlobal = objectTypes[typeof global] && global;
+  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
+    window = freeGlobal;
+  }
+
   /*--------------------------------------------------------------------------*/
 
   /**