diff --git a/build.js b/build.js
index 0b6661179..cd35665e2 100644
--- a/build.js
+++ b/build.js
@@ -3623,7 +3623,7 @@
           source = replaceFunction(source, 'where', [
             'function where(collection, properties, first) {',
             '  return (first && isEmpty(properties))',
-            '    ? null',
+            '    ? undefined',
             '    : (first ? find : filter)(collection, properties);',
             '}'
           ].join('\n'));
diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index a319e75b3..68ff46864 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -2431,7 +2431,7 @@
    */
   function where(collection, properties, first) {
     return (first && isEmpty(properties))
-      ? null
+      ? undefined
       : (first ? find : filter)(collection, properties);
   }
 
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index e8421608a..cc0376098 100644
--- a/dist/lodash.underscore.min.js
+++ b/dist/lodash.underscore.min.js
@@ -3,34 +3,34 @@
  * Lo-Dash 1.3.1 (Custom Build) lodash.com/license | Underscore.js 1.5.1 underscorejs.org/LICENSE
  * Build: `lodash underscore exports="amd,commonjs,global,node" -o ./dist/lodash.underscore.js`
  */
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\ No newline at end of file
diff --git a/test/test-build.js b/test/test-build.js
index e435e8b45..7977b005e 100644
--- a/test/test-build.js
+++ b/test/test-build.js
@@ -1074,10 +1074,10 @@
 
         collection = [{ 'a': 1 }, { 'a': 1 }];
         deepEqual(lodash.where(collection, { 'a': 1 }, true), collection[0], '_.where supports a `first` argument: ' + basename);
-        deepEqual(lodash.where(collection, {}, true), null, '_.where should return `null` when passed `first` and falsey `properties`: ' + basename);
+        deepEqual(lodash.where(collection, {}, true), undefined, '_.where should return `undefined` when passed `first` and falsey `properties`: ' + basename);
 
         deepEqual(lodash.findWhere(collection, { 'a': 1 }), collection[0], '_.findWhere: ' + basename);
-        strictEqual(lodash.findWhere(collection, {}), null, '_.findWhere should return `null` for falsey `properties`: ' + basename);
+        strictEqual(lodash.findWhere(collection, {}), undefined, '_.findWhere should return `undefined` for falsey `properties`: ' + basename);
 
         var expected = [[['moe', 30, true]], [['larry', 40, false]]];
         actual = lodash.unzip(lodash.zip(['moe', 'larry'], [30, 40], [true, false]));