diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
index 668f37cb0f84..2d1d1450804c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
@@ -49,12 +49,12 @@ public function getConfigTreeBuilder()
                 ->scalarNode('charset')->end()
                 ->arrayNode('trusted_proxies')
                     ->beforeNormalization()
-                        ->ifTrue(function($v) { return !is_array($v); })
-                        ->then(function($v) { return preg_split('/\s*,\s*/', $v); })
+                        ->ifTrue(function($v) { return !is_array($v) && !is_null($v); })
+                        ->then(function($v) { return is_bool($v) ? array() : preg_split('/\s*,\s*/', $v); })
                     ->end()
                     ->prototype('scalar')
                         ->validate()
-                            ->ifTrue(function($v) { return !filter_var($v, FILTER_VALIDATE_IP); })
+                            ->ifTrue(function($v) { return !empty($v) && !filter_var($v, FILTER_VALIDATE_IP); })
                             ->thenInvalid('Invalid proxy IP "%s"')
                         ->end()
                     ->end()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
index 1c5c72098ff7..949dc18d61db 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -53,6 +53,9 @@ public function getTestValidTrustedProxiesData()
             array(array('secret' => 's3cr3t', 'trusted_proxies' => array('127.0.0.1')), array('secret' => 's3cr3t', 'trusted_proxies' => array('127.0.0.1'), 'trust_proxy_headers' => false, 'ide' => NULL, 'annotations' => array('cache' => 'file', 'file_cache_dir' => '%kernel.cache_dir%/annotations', 'debug' => false))),
             array(array('secret' => 's3cr3t', 'trusted_proxies' => array('::1')), array('secret' => 's3cr3t', 'trusted_proxies' => array('::1'), 'trust_proxy_headers' => false, 'ide' => NULL, 'annotations' => array('cache' => 'file', 'file_cache_dir' => '%kernel.cache_dir%/annotations', 'debug' => false))),
             array(array('secret' => 's3cr3t', 'trusted_proxies' => array('127.0.0.1', '::1')), array('secret' => 's3cr3t', 'trusted_proxies' => array('127.0.0.1', '::1'), 'trust_proxy_headers' => false, 'ide' => NULL, 'annotations' => array('cache' => 'file', 'file_cache_dir' => '%kernel.cache_dir%/annotations', 'debug' => false))),
+            array(array('secret' => 's3cr3t', 'trusted_proxies' => null), array('secret' => 's3cr3t', 'trusted_proxies' => array(), 'trust_proxy_headers' => false, 'ide' => NULL, 'annotations' => array('cache' => 'file', 'file_cache_dir' => '%kernel.cache_dir%/annotations', 'debug' => false))),
+            array(array('secret' => 's3cr3t', 'trusted_proxies' => false), array('secret' => 's3cr3t', 'trusted_proxies' => array(), 'trust_proxy_headers' => false, 'ide' => NULL, 'annotations' => array('cache' => 'file', 'file_cache_dir' => '%kernel.cache_dir%/annotations', 'debug' => false))),
+            array(array('secret' => 's3cr3t', 'trusted_proxies' => array()), array('secret' => 's3cr3t', 'trusted_proxies' => array(), 'trust_proxy_headers' => false, 'ide' => NULL, 'annotations' => array('cache' => 'file', 'file_cache_dir' => '%kernel.cache_dir%/annotations', 'debug' => false))),
         );
     }