diff --git a/src/Symfony/Component/HttpFoundation/IpUtils.php b/src/Symfony/Component/HttpFoundation/IpUtils.php
index fb906b6812d23..5e7c607137675 100644
--- a/src/Symfony/Component/HttpFoundation/IpUtils.php
+++ b/src/Symfony/Component/HttpFoundation/IpUtils.php
@@ -62,12 +62,12 @@ public static function checkIp($requestIp, $ips)
     public static function checkIp4($requestIp, $ip)
     {
         if (false !== strpos($ip, '/')) {
-            if ('0.0.0.0/0' === $ip) {
+            list($address, $netmask) = explode('/', $ip, 2);
+
+            if ('0' === $netmask) {
                 return true;
             }
 
-            list($address, $netmask) = explode('/', $ip, 2);
-
             if ($netmask < 1 || $netmask > 32) {
                 return false;
             }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
index 0002478246ab9..edaa0ca40bbb2 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
@@ -35,8 +35,7 @@ public function testIpv4Provider()
             array(true, '192.168.1.1', array('192.168.1.0/24', '1.2.3.4/1')),
             array(false, '192.168.1.1', array('1.2.3.4/1', '4.3.2.1/1')),
             array(true, '1.2.3.4', '0.0.0.0/0'),
-            array(false, '1.2.3.4', '256.256.256/0'),
-            array(false, '1.2.3.4', '192.168.1.0/0'),
+            array(true, '1.2.3.4', '192.168.1.0/0'),
         );
     }