diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/Security/UserProvider/EntityFactory.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/Security/UserProvider/EntityFactory.php
index 454c7cc0b9222..aae6a8643868a 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/Security/UserProvider/EntityFactory.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/Security/UserProvider/EntityFactory.php
@@ -52,7 +52,11 @@ public function addConfiguration(NodeDefinition $node)
     {
         $node
             ->children()
-                ->scalarNode('class')->isRequired()->cannotBeEmpty()->end()
+                ->scalarNode('class')
+                    ->isRequired()
+                    ->info('The full entity class name of your user class.')
+                    ->cannotBeEmpty()
+                ->end()
                 ->scalarNode('property')->defaultNull()->end()
                 ->scalarNode('manager_name')->defaultNull()->end()
             ->end()
diff --git a/src/Symfony/Component/Config/Definition/ArrayNode.php b/src/Symfony/Component/Config/Definition/ArrayNode.php
index 2a828caf78538..9cd654f791d7f 100644
--- a/src/Symfony/Component/Config/Definition/ArrayNode.php
+++ b/src/Symfony/Component/Config/Definition/ArrayNode.php
@@ -213,7 +213,11 @@ protected function finalizeValue($value)
         foreach ($this->children as $name => $child) {
             if (!\array_key_exists($name, $value)) {
                 if ($child->isRequired()) {
-                    $ex = new InvalidConfigurationException(sprintf('The child node "%s" at path "%s" must be configured.', $name, $this->getPath()));
+                    $message = sprintf('The child config "%s" under "%s" must be configured.', $name, $this->getPath());
+                    if ($child->getInfo()) {
+                        $message .= sprintf("\n\n Description: %s", $child->getInfo());
+                    }
+                    $ex = new InvalidConfigurationException($message);
                     $ex->setPath($this->getPath());
 
                     throw $ex;