diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
index 7cc3d5c805..a18eb957b5 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
@@ -122,7 +122,15 @@ class NumberToLocalizedStringTransformer implements DataTransformerInterface
             $value = str_replace(',', $decSep, $value);
         }
 
-        $result = $formatter->parse($value, \NumberFormatter::TYPE_DOUBLE, $position);
+        if (false !== strpos($value, $decSep)) {
+            $type = \NumberFormatter::TYPE_DOUBLE;
+        } else {
+            $type = PHP_INT_SIZE === 8
+                ? \NumberFormatter::TYPE_INT64
+                : \NumberFormatter::TYPE_INT32;
+        }
+
+        $result = $formatter->parse($value, $type, $position);
 
         if (intl_is_failure($formatter->getErrorCode())) {
             throw new TransformationFailedException($formatter->getErrorMessage());
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
index e829871ec3..87cdf964c8 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
@@ -433,4 +433,11 @@ class NumberToLocalizedStringTransformerTest extends \PHPUnit_Framework_TestCase
 
         $transformer->reverseTransform("12\xc2\xa0345,678foo");
     }
+
+    public function testReverseTransformBigint()
+    {
+        $transformer = new NumberToLocalizedStringTransformer(null, true);
+
+        $this->assertEquals(PHP_INT_MAX - 1, (int) $transformer->reverseTransform((string) (PHP_INT_MAX - 1)));
+    }
 }