diff --git a/src/Illuminate/Collections/Arr.php b/src/Illuminate/Collections/Arr.php
index 49b17766499a..ffa73e50165b 100644
--- a/src/Illuminate/Collections/Arr.php
+++ b/src/Illuminate/Collections/Arr.php
@@ -172,7 +172,7 @@ public static function dot($array, $prepend = '')
                 if (is_array($value) && ! empty($value)) {
                     $flatten($value, $newKey.'.');
                 } else {
-                    $results[$newKey] = $value;
+                    $results[$newKey] = is_array($value) ? null : $value;
                 }
             }
         };
diff --git a/tests/Support/SupportArrTest.php b/tests/Support/SupportArrTest.php
index ab5c2f2150a7..13504fb65a37 100644
--- a/tests/Support/SupportArrTest.php
+++ b/tests/Support/SupportArrTest.php
@@ -217,10 +217,10 @@ public function testDot()
         $this->assertSame([], $array);
 
         $array = Arr::dot(['foo' => []]);
-        $this->assertSame(['foo' => []], $array);
+        $this->assertSame(['foo' => null], $array);
 
         $array = Arr::dot(['foo' => ['bar' => []]]);
-        $this->assertSame(['foo.bar' => []], $array);
+        $this->assertSame(['foo.bar' => null], $array);
 
         $array = Arr::dot(['name' => 'taylor', 'languages' => ['php' => true]]);
         $this->assertSame(['name' => 'taylor', 'languages.php' => true], $array);
@@ -243,7 +243,7 @@ public function testDot()
         $array = Arr::dot(['foo' => 'bar', 'empty_array' => [], 'user' => ['name' => 'Taylor'], 'key' => 'value']);
         $this->assertSame([
             'foo' => 'bar',
-            'empty_array' => [],
+            'empty_array' => null,
             'user.name' => 'Taylor',
             'key' => 'value',
         ], $array);