diff --git a/src/Symfony/Component/HttpFoundation/IpUtils.php b/src/Symfony/Component/HttpFoundation/IpUtils.php
index 3cd5145610..aaa1647556 100644
--- a/src/Symfony/Component/HttpFoundation/IpUtils.php
+++ b/src/Symfony/Component/HttpFoundation/IpUtils.php
@@ -39,7 +39,7 @@ class IpUtils
             $ips = array($ips);
         }
 
-        $method = false !== strpos($requestIp, ':') ? 'checkIp6' : 'checkIp4';
+        $method = substr_count($requestIp, ':') > 1 ? 'checkIp6' : 'checkIp4';
 
         foreach ($ips as $ip) {
             if (self::$method($requestIp, $ip)) {