diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddConstraintValidatorsPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddConstraintValidatorsPass.php
index e1e1edc416..800a32e2f3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddConstraintValidatorsPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddConstraintValidatorsPass.php
@@ -28,7 +28,17 @@ class AddConstraintValidatorsPass implements CompilerPassInterface
                 $validators[$attributes[0]['alias']] = $id;
             }
 
-            $validators[$container->getDefinition($id)->getClass()] = $id;
+            $definition = $container->getDefinition($id);
+
+            if (!$definition->isPublic()) {
+                throw new InvalidArgumentException(sprintf('The service "%s" must be public as it can be lazy-loaded.', $id));
+            }
+
+            if ($definition->isAbstract()) {
+                throw new InvalidArgumentException(sprintf('The service "%s" must not be abstract as it can be lazy-loaded.', $id));
+            }
+
+            $validators[$definition->getClass()] = $id;
         }
 
         $container->getDefinition('validator.validator_factory')->replaceArgument(1, $validators);
diff --git a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
index 499f39c6c9..97f6122ff7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
+++ b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
@@ -75,7 +75,7 @@ class FrameworkBundle extends Bundle
         // but as late as possible to get resolved parameters
         $container->addCompilerPass(new RegisterListenersPass(), PassConfig::TYPE_BEFORE_REMOVING);
         $container->addCompilerPass(new TemplatingPass());
-        $container->addCompilerPass(new AddConstraintValidatorsPass());
+        $container->addCompilerPass(new AddConstraintValidatorsPass(), PassConfig::TYPE_BEFORE_REMOVING);
         $container->addCompilerPass(new AddValidatorInitializersPass());
         $container->addCompilerPass(new AddConsoleCommandPass());
         $container->addCompilerPass(new FormPass());