diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index 04b370aa4..e15ba1127 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -3931,7 +3931,7 @@
    * // => { 'name': 'barney', 'age': 36, 'employer': 'slate' }
    */
   function assign(object) {
-    if (!object) {
+    if (object == null) {
       return object;
     }
     var args = arguments,
@@ -4024,7 +4024,7 @@
    * // => { 'name': 'barney', 'age': 36, 'employer': 'slate' }
    */
   function defaults(object) {
-    if (!object) {
+    if (object == null) {
       return object;
     }
     var args = arguments,
diff --git a/lodash.js b/lodash.js
index 97c4bba9e..f778f0dd0 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2304,7 +2304,7 @@
         var args = arguments,
             length = args.length;
 
-        if (!object || length < 2) {
+        if (object == null || length < 2) {
           return object;
         }
         // enables use as a callback for functions like `_.reduce`
@@ -6150,7 +6150,7 @@
      * // => { 'name': 'barney', 'age': 36, 'employer': 'slate' }
      */
     function defaults(object) {
-      if (!object) {
+      if (object == null) {
         return object;
       }
       var args = slice(arguments);