diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index 84e2f88b..7a1d94b2 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -141,21 +141,11 @@ public function getConfigTreeBuilder()
                         ->end()
                         ->scalarNode('formatter')->defaultNull()->end()
                         ->scalarNode('captured_body_length')
-                            ->beforeNormalization()
-                                ->always(function ($maxLength) {
-                                    if (null === $maxLength) {
-                                        return null;
-                                    }
-
-                                    if (!is_int($maxLength)) {
-                                        $invalidConfiguration = new InvalidConfigurationException('The child node "captured_body_length" at path "httplug.profiling" must be an integer or null.');
-                                        $invalidConfiguration->setPath('httplug.profiling');
-
-                                        throw $invalidConfiguration;
-                                    }
-
-                                    return $maxLength;
+                            ->validate()
+                                ->ifTrue(function ($v) {
+                                    return null !== $v && !is_int($v);
                                 })
+                                ->thenInvalid('The child node "captured_body_length" at path "httplug.profiling" must be an integer or null ("%s" given).')
                             ->end()
                             ->defaultValue(0)
                             ->info('Limit long HTTP message bodies to x characters. If set to 0 we do not read the message body. If null the body will not be truncated. Only available with the default formatter (FullHttpMessageFormatter).')
diff --git a/tests/Unit/DependencyInjection/ConfigurationTest.php b/tests/Unit/DependencyInjection/ConfigurationTest.php
index 570e7482..31b33c96 100644
--- a/tests/Unit/DependencyInjection/ConfigurationTest.php
+++ b/tests/Unit/DependencyInjection/ConfigurationTest.php
@@ -406,7 +406,7 @@ public function testLimitlessCapturedBodyLength()
 
     /**
      * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
-     * @expectedExceptionMessage The child node "captured_body_length" at path "httplug.profiling" must be an integer or null.
+     * @expectedExceptionMessage The child node "captured_body_length" at path "httplug.profiling" must be an integer or null
      */
     public function testInvalidCapturedBodyLengthString()
     {