diff --git a/src/Illuminate/Validation/ValidationRuleParser.php b/src/Illuminate/Validation/ValidationRuleParser.php
index b8e42559dbec..ef7bfb630a6f 100644
--- a/src/Illuminate/Validation/ValidationRuleParser.php
+++ b/src/Illuminate/Validation/ValidationRuleParser.php
@@ -131,7 +131,7 @@ protected function explodeWildcardRules($results, $attribute, $rules)
         foreach ($data as $key => $value) {
             if (Str::startsWith($key, $attribute) || (bool) preg_match('/^'.$pattern.'\z/', $key)) {
                 foreach ((array) $rules as $rule) {
-                    $this->implicitAttributes[$attribute][] = $key;
+                    $this->implicitAttributes[$attribute][] = strval($key);
 
                     $results = $this->mergeRules($results, $key, $rule);
                 }
diff --git a/tests/Validation/ValidationValidatorTest.php b/tests/Validation/ValidationValidatorTest.php
index 8b8f04a24cd0..c76935c5fcb1 100755
--- a/tests/Validation/ValidationValidatorTest.php
+++ b/tests/Validation/ValidationValidatorTest.php
@@ -1899,6 +1899,29 @@ public function testValidateDistinct()
         $this->assertEquals('There is a duplication!', $v->messages()->first('foo.1'));
     }
 
+    public function testValidateDistinctForTopLevelArrays()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+
+        $v = new Validator($trans, ['foo', 'foo'], ['*' => 'distinct']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, [['foo' => 1], ['foo' => 1]], ['*' => 'array', '*.foo' => 'distinct']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, [['foo' => 'a'], ['foo' => 'A']], ['*' => 'array', '*.foo' => 'distinct:ignore_case']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, [['foo' => [['id' => 1]]], ['foo' => [['id' => 1]]]], ['*' => 'array', '*.foo' => 'array', '*.foo.*.id' => 'distinct']);
+        $this->assertFalse($v->passes());
+
+        $v = new Validator($trans, ['foo', 'foo'], ['*' => 'distinct'], ['*.distinct' => 'There is a duplication!']);
+        $this->assertFalse($v->passes());
+        $v->messages()->setFormat(':message');
+        $this->assertEquals('There is a duplication!', $v->messages()->first('0'));
+        $this->assertEquals('There is a duplication!', $v->messages()->first('1'));
+    }
+
     public function testValidateUnique()
     {
         $trans = $this->getIlluminateArrayTranslator();