diff --git a/README.md b/README.md
index 6028ddf6b..e0208a9bf 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# lodash-amd v4.2.0
+# lodash-amd v4.2.1
 
 The [lodash](https://lodash.com/) library exported as [AMD](https://github.com/amdjs/amdjs-api/wiki/AMD) modules.
 
@@ -27,4 +27,4 @@ require({
 });
 ```
 
-See the [package source](https://github.com/lodash/lodash/tree/4.2.0-amd) for more details.
+See the [package source](https://github.com/lodash/lodash/tree/4.2.1-amd) for more details.
diff --git a/bind.js b/bind.js
index 19d27188f..1e7bfde87 100644
--- a/bind.js
+++ b/bind.js
@@ -42,7 +42,9 @@ define(['./_createWrapper', './_replaceHolders', './rest'], function(createWrapp
   var bind = rest(function(func, thisArg, partials) {
     var bitmask = BIND_FLAG;
     if (partials.length) {
-      var holders = replaceHolders(partials, bind.placeholder);
+      var placeholder = bind.placeholder,
+          holders = replaceHolders(partials, placeholder);
+
       bitmask |= PARTIAL_FLAG;
     }
     return createWrapper(func, bitmask, thisArg, partials, holders);
diff --git a/bindKey.js b/bindKey.js
index dc3e2d05c..8053f3a53 100644
--- a/bindKey.js
+++ b/bindKey.js
@@ -52,7 +52,9 @@ define(['./_createWrapper', './_replaceHolders', './rest'], function(createWrapp
   var bindKey = rest(function(object, key, partials) {
     var bitmask = BIND_FLAG | BIND_KEY_FLAG;
     if (partials.length) {
-      var holders = replaceHolders(partials, bindKey.placeholder);
+      var placeholder = bindKey.placeholder,
+          holders = replaceHolders(partials, placeholder);
+
       bitmask |= PARTIAL_FLAG;
     }
     return createWrapper(key, bitmask, object, partials, holders);
diff --git a/debounce.js b/debounce.js
index 20852e84c..dd75abb5c 100644
--- a/debounce.js
+++ b/debounce.js
@@ -20,7 +20,7 @@ define(['./isObject', './now', './toNumber'], function(isObject, now, toNumber)
    * to the debounced function return the result of the last `func` invocation.
    *
    * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
-   * on the trailing edge of the timeout only if the the debounced function is
+   * on the trailing edge of the timeout only if the debounced function is
    * invoked more than once during the `wait` timeout.
    *
    * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
diff --git a/main.js b/main.js
index a1cbdf230..b83e37850 100644
--- a/main.js
+++ b/main.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * lodash 4.2.0 (Custom Build) <https://lodash.com/>
+ * lodash 4.2.1 (Custom Build) <https://lodash.com/>
  * Build: `lodash exports="amd" -d -o ./main.js`
  * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
@@ -13,7 +13,7 @@
   var undefined;
 
   /** Used as the semantic version number. */
-  var VERSION = '4.2.0';
+  var VERSION = '4.2.1';
 
   /** Used to compose bitmasks for wrapper metadata. */
   var BIND_FLAG = 1,
@@ -4120,7 +4120,7 @@
             index = length,
             args = Array(length),
             fn = (this && this !== root && this instanceof wrapper) ? Ctor : func,
-            placeholder = wrapper.placeholder;
+            placeholder = lodash.placeholder || wrapper.placeholder;
 
         while (index--) {
           args[index] = arguments[index];
@@ -4236,7 +4236,7 @@
           args = composeArgsRight(args, partialsRight, holdersRight);
         }
         if (isCurry || isCurryRight) {
-          var placeholder = wrapper.placeholder,
+          var placeholder = lodash.placeholder || wrapper.placeholder,
               argsHolders = replaceHolders(args, placeholder);
 
           length -= argsHolders.length;
@@ -6126,7 +6126,7 @@
 
     /**
      * This method is like `_.pullAll` except that it accepts `iteratee` which is
-     * invoked for each element of `array` and `values` to to generate the criterion
+     * invoked for each element of `array` and `values` to generate the criterion
      * by which uniqueness is computed. The iteratee is invoked with one argument: (value).
      *
      * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
@@ -8343,7 +8343,9 @@
     var bind = rest(function(func, thisArg, partials) {
       var bitmask = BIND_FLAG;
       if (partials.length) {
-        var holders = replaceHolders(partials, bind.placeholder);
+        var placeholder = lodash.placeholder || bind.placeholder,
+            holders = replaceHolders(partials, placeholder);
+
         bitmask |= PARTIAL_FLAG;
       }
       return createWrapper(func, bitmask, thisArg, partials, holders);
@@ -8396,7 +8398,9 @@
     var bindKey = rest(function(object, key, partials) {
       var bitmask = BIND_FLAG | BIND_KEY_FLAG;
       if (partials.length) {
-        var holders = replaceHolders(partials, bindKey.placeholder);
+        var placeholder = lodash.placeholder || bindKey.placeholder,
+            holders = replaceHolders(partials, placeholder);
+
         bitmask |= PARTIAL_FLAG;
       }
       return createWrapper(key, bitmask, object, partials, holders);
@@ -8445,7 +8449,7 @@
     function curry(func, arity, guard) {
       arity = guard ? undefined : arity;
       var result = createWrapper(func, CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
-      result.placeholder = curry.placeholder;
+      result.placeholder = lodash.placeholder || curry.placeholder;
       return result;
     }
 
@@ -8489,7 +8493,7 @@
     function curryRight(func, arity, guard) {
       arity = guard ? undefined : arity;
       var result = createWrapper(func, CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
-      result.placeholder = curryRight.placeholder;
+      result.placeholder = lodash.placeholder || curryRight.placeholder;
       return result;
     }
 
@@ -8504,7 +8508,7 @@
      * to the debounced function return the result of the last `func` invocation.
      *
      * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
-     * on the trailing edge of the timeout only if the the debounced function is
+     * on the trailing edge of the timeout only if the debounced function is
      * invoked more than once during the `wait` timeout.
      *
      * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
@@ -8911,7 +8915,9 @@
      * // => 'hi fred'
      */
     var partial = rest(function(func, partials) {
-      var holders = replaceHolders(partials, partial.placeholder);
+      var placeholder = lodash.placeholder || partial.placeholder,
+          holders = replaceHolders(partials, placeholder);
+
       return createWrapper(func, PARTIAL_FLAG, undefined, partials, holders);
     });
 
@@ -8947,7 +8953,9 @@
      * // => 'hello fred'
      */
     var partialRight = rest(function(func, partials) {
-      var holders = replaceHolders(partials, partialRight.placeholder);
+      var placeholder = lodash.placeholder || partialRight.placeholder,
+          holders = replaceHolders(partials, placeholder);
+
       return createWrapper(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
     });
 
@@ -9086,7 +9094,7 @@
      * result of the last `func` invocation.
      *
      * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
-     * on the trailing edge of the timeout only if the the throttled function is
+     * on the trailing edge of the timeout only if the throttled function is
      * invoked more than once during the `wait` timeout.
      *
      * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
diff --git a/package.json b/package.json
index 835876ba3..0b4dd2dd3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lodash-amd",
-  "version": "4.2.0",
+  "version": "4.2.1",
   "description": "Lodash exported as AMD modules.",
   "homepage": "https://lodash.com/custom-builds",
   "license": "MIT",
diff --git a/partial.js b/partial.js
index 6850add55..2212f4fbe 100644
--- a/partial.js
+++ b/partial.js
@@ -39,7 +39,9 @@ define(['./_createWrapper', './_replaceHolders', './rest'], function(createWrapp
    * // => 'hi fred'
    */
   var partial = rest(function(func, partials) {
-    var holders = replaceHolders(partials, partial.placeholder);
+    var placeholder = partial.placeholder,
+        holders = replaceHolders(partials, placeholder);
+
     return createWrapper(func, PARTIAL_FLAG, undefined, partials, holders);
   });
 
diff --git a/partialRight.js b/partialRight.js
index 5198b051b..64aecd97a 100644
--- a/partialRight.js
+++ b/partialRight.js
@@ -38,7 +38,9 @@ define(['./_createWrapper', './_replaceHolders', './rest'], function(createWrapp
    * // => 'hello fred'
    */
   var partialRight = rest(function(func, partials) {
-    var holders = replaceHolders(partials, partialRight.placeholder);
+    var placeholder = partialRight.placeholder,
+        holders = replaceHolders(partials, placeholder);
+
     return createWrapper(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
   });
 
diff --git a/pullAllBy.js b/pullAllBy.js
index 84b469f28..4580f5454 100644
--- a/pullAllBy.js
+++ b/pullAllBy.js
@@ -2,7 +2,7 @@ define(['./_baseIteratee', './_basePullAllBy'], function(baseIteratee, basePullA
 
   /**
    * This method is like `_.pullAll` except that it accepts `iteratee` which is
-   * invoked for each element of `array` and `values` to to generate the criterion
+   * invoked for each element of `array` and `values` to generate the criterion
    * by which uniqueness is computed. The iteratee is invoked with one argument: (value).
    *
    * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
diff --git a/throttle.js b/throttle.js
index 01cba010b..bc32e5bce 100644
--- a/throttle.js
+++ b/throttle.js
@@ -14,7 +14,7 @@ define(['./debounce', './isObject'], function(debounce, isObject) {
    * result of the last `func` invocation.
    *
    * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
-   * on the trailing edge of the timeout only if the the throttled function is
+   * on the trailing edge of the timeout only if the throttled function is
    * invoked more than once during the `wait` timeout.
    *
    * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)