diff --git a/src/Symfony/Component/Config/Definition/BaseNode.php b/src/Symfony/Component/Config/Definition/BaseNode.php
index 16dfccb54c1d2..40ed28a37365a 100644
--- a/src/Symfony/Component/Config/Definition/BaseNode.php
+++ b/src/Symfony/Component/Config/Definition/BaseNode.php
@@ -332,7 +332,7 @@ final public function normalize($value)
 
         // run custom normalization closures
         foreach ($this->normalizationClosures as $closure) {
-            $value = $closure($value);
+            $value = $closure($value, $value !== self::resolvePlaceholderValue($value));
         }
 
         // resolve placeholder value
diff --git a/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php b/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
index 7ba19515b82d1..8a862d88cc388 100644
--- a/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
+++ b/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
@@ -238,7 +238,7 @@ public static function buildExpressions(array $expressions)
                 $if = $expr->ifPart;
                 $then = $expr->thenPart;
                 $expressions[$k] = function ($v) use ($if, $then) {
-                    return $if($v) ? $then($v) : $v;
+                    return $if(...\func_get_args()) ? $then(...\func_get_args()) : $v;
                 };
             }
         }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
index 0638f90417df5..281bac297107b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
@@ -265,6 +265,21 @@ public function testDiscardedEnvInConfig(): void
         $this->assertSame('1', $container->getParameter('boolish'));
     }
 
+    /**
+     * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidTypeException
+     * @expectedExceptionMessage A dynamic value is not compatible with a "Symfony\Component\Config\Definition\PrototypedArrayNode" node type at path "env_extension.nodes".
+     */
+    public function testNormalizedPlaceholderArray()
+    {
+        $container = new ContainerBuilder();
+        $container->registerExtension($ext = new EnvExtension(new ConfigurationWithArrayNodeRequiringOneElement()));
+        $container->loadFromExtension('env_extension', array(
+            'nodes' => '%env(SOME)%',
+        ));
+
+        $this->doProcess($container);
+    }
+
     private function doProcess(ContainerBuilder $container): void
     {
         (new MergeExtensionConfigurationPass())->process($container);
@@ -340,10 +355,16 @@ class ConfigurationWithArrayNodeRequiringOneElement implements ConfigurationInte
 {
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $treeBuilder->root('env_extension')
+        $treeBuilder = new TreeBuilder('env_extension');
+        $treeBuilder->getRootNode()
             ->children()
                 ->arrayNode('nodes')
+                    ->beforeNormalization()
+                        ->ifString()
+                        ->then(function ($v, bool $isEnv) {
+                            return $isEnv ? $v : array($v);
+                        })
+                    ->end()
                     ->isRequired()
                     ->requiresAtLeastOneElement()
                     ->scalarPrototype()->end()