diff --git a/src/Symfony/Component/Intl/Collator/Collator.php b/src/Symfony/Component/Intl/Collator/Collator.php
index 272a6c13e15b..90fba8d4919f 100644
--- a/src/Symfony/Component/Intl/Collator/Collator.php
+++ b/src/Symfony/Component/Intl/Collator/Collator.php
@@ -70,13 +70,13 @@ class Collator
     /**
      * Constructor.
      *
-     * @param string $locale The locale code. The only currently supported locale is "en".
+     * @param string $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en").
      *
-     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" is passed
+     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      */
     public function __construct($locale)
     {
-        if ('en' != $locale) {
+        if ('en' !== $locale && null !== $locale) {
             throw new MethodArgumentValueNotImplementedException(__METHOD__, 'locale', $locale, 'Only the locale "en" is supported');
         }
     }
@@ -84,11 +84,11 @@ public function __construct($locale)
     /**
      * Static constructor.
      *
-     * @param string $locale The locale code. The only currently supported locale is "en".
+     * @param string $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en").
      *
      * @return Collator
      *
-     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" is passed
+     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      */
     public static function create($locale)
     {
diff --git a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
index 9b08d1a37895..f08ed8d8eddf 100644
--- a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
+++ b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
@@ -129,7 +129,7 @@ class IntlDateFormatter
     /**
      * Constructor.
      *
-     * @param string $locale   The locale code. The only currently supported locale is "en".
+     * @param string $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en").
      * @param int    $datetype Type of date formatting, one of the format type constants
      * @param int    $timetype Type of time formatting, one of the format type constants
      * @param string $timezone Timezone identifier
@@ -140,12 +140,12 @@ class IntlDateFormatter
      * @see http://www.php.net/manual/en/intldateformatter.create.php
      * @see http://userguide.icu-project.org/formatparse/datetime
      *
-     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" is passed
+     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      * @throws MethodArgumentValueNotImplementedException When $calendar different than GREGORIAN is passed
      */
     public function __construct($locale, $datetype, $timetype, $timezone = null, $calendar = self::GREGORIAN, $pattern = null)
     {
-        if ('en' !== $locale) {
+        if ('en' !== $locale && null !== $locale) {
             throw new MethodArgumentValueNotImplementedException(__METHOD__, 'locale', $locale, 'Only the locale "en" is supported');
         }
 
@@ -163,7 +163,7 @@ public function __construct($locale, $datetype, $timetype, $timezone = null, $ca
     /**
      * Static constructor.
      *
-     * @param string $locale   The locale code. The only currently supported locale is "en".
+     * @param string $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en").
      * @param int    $datetype Type of date formatting, one of the format type constants
      * @param int    $timetype Type of time formatting, one of the format type constants
      * @param string $timezone Timezone identifier
@@ -176,7 +176,7 @@ public function __construct($locale, $datetype, $timetype, $timezone = null, $ca
      * @see http://www.php.net/manual/en/intldateformatter.create.php
      * @see http://userguide.icu-project.org/formatparse/datetime
      *
-     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" is passed
+     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      * @throws MethodArgumentValueNotImplementedException When $calendar different than GREGORIAN is passed
      */
     public static function create($locale, $datetype, $timetype, $timezone = null, $calendar = self::GREGORIAN, $pattern = null)
diff --git a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
index b35b943dd4de..d906cdddd1c2 100644
--- a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
+++ b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
@@ -245,7 +245,7 @@ class NumberFormatter
     /**
      * Constructor.
      *
-     * @param string $locale  The locale code. The only currently supported locale is "en".
+     * @param string $locale  The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en").
      * @param int    $style   Style of the formatting, one of the format style constants.
      *                        The only supported styles are NumberFormatter::DECIMAL
      *                        and NumberFormatter::CURRENCY.
@@ -257,13 +257,13 @@ class NumberFormatter
      * @see http://www.icu-project.org/apiref/icu4c/classDecimalFormat.html#_details
      * @see http://www.icu-project.org/apiref/icu4c/classRuleBasedNumberFormat.html#_details
      *
-     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" is passed
+     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      * @throws MethodArgumentValueNotImplementedException When the $style is not supported
      * @throws MethodArgumentNotImplementedException      When the pattern value is different than null
      */
     public function __construct($locale = 'en', $style = null, $pattern = null)
     {
-        if ('en' != $locale) {
+        if ('en' !== $locale && null !== $locale) {
             throw new MethodArgumentValueNotImplementedException(__METHOD__, 'locale', $locale, 'Only the locale "en" is supported');
         }
 
@@ -282,7 +282,7 @@ public function __construct($locale = 'en', $style = null, $pattern = null)
     /**
      * Static constructor.
      *
-     * @param string $locale  The locale code. The only supported locale is "en".
+     * @param string $locale  The locale code. The only supported locale is "en" (or null using the default locale, i.e. "en").
      * @param int    $style   Style of the formatting, one of the format style constants.
      *                        The only currently supported styles are NumberFormatter::DECIMAL
      *                        and NumberFormatter::CURRENCY.
@@ -296,7 +296,7 @@ public function __construct($locale = 'en', $style = null, $pattern = null)
      * @see http://www.icu-project.org/apiref/icu4c/classDecimalFormat.html#_details
      * @see http://www.icu-project.org/apiref/icu4c/classRuleBasedNumberFormat.html#_details
      *
-     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" is passed
+     * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      * @throws MethodArgumentValueNotImplementedException When the $style is not supported
      * @throws MethodArgumentNotImplementedException      When the pattern value is different than null
      */
diff --git a/src/Symfony/Component/Intl/Tests/Collator/CollatorTest.php b/src/Symfony/Component/Intl/Tests/Collator/CollatorTest.php
index a4e4e56b2077..840d97532f09 100644
--- a/src/Symfony/Component/Intl/Tests/Collator/CollatorTest.php
+++ b/src/Symfony/Component/Intl/Tests/Collator/CollatorTest.php
@@ -60,6 +60,12 @@ public function testGetLocale()
         $this->assertEquals('en', $collator->getLocale());
     }
 
+    public function testConstructWithoutLocale()
+    {
+        $collator = $this->getCollator(null);
+        $this->assertInstanceOf('\Symfony\Component\Intl\Collator\Collator', $collator);
+    }
+
     /**
      * @expectedException \Symfony\Component\Intl\Exception\MethodNotImplementedException
      */
diff --git a/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php b/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php
index 2e7544b39e00..173c697455bc 100644
--- a/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php
@@ -22,6 +22,12 @@ public function testConstructor()
         $this->assertEquals('y-M-d', $formatter->getPattern());
     }
 
+    public function testConstructorWithoutLocale()
+    {
+        $formatter = new IntlDateFormatter(null, IntlDateFormatter::MEDIUM, IntlDateFormatter::SHORT, 'UTC', IntlDateFormatter::GREGORIAN, 'y-M-d');
+        $this->assertEquals('y-M-d', $formatter->getPattern());
+    }
+
     /**
      * @expectedException \Symfony\Component\Intl\Exception\MethodArgumentValueNotImplementedException
      */
diff --git a/src/Symfony/Component/Intl/Tests/NumberFormatter/NumberFormatterTest.php b/src/Symfony/Component/Intl/Tests/NumberFormatter/NumberFormatterTest.php
index 519e753bd5be..74fd530359eb 100644
--- a/src/Symfony/Component/Intl/Tests/NumberFormatter/NumberFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/NumberFormatter/NumberFormatterTest.php
@@ -70,6 +70,14 @@ public function testSetAttributeInvalidRoundingMode()
         $formatter->setAttribute(NumberFormatter::ROUNDING_MODE, null);
     }
 
+    public function testConstructWithoutLocale()
+    {
+        $this->assertInstanceOf(
+            '\Symfony\Component\Intl\NumberFormatter\NumberFormatter',
+            $this->getNumberFormatter(null, NumberFormatter::DECIMAL)
+        );
+    }
+
     public function testCreate()
     {
         $this->assertInstanceOf(