diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php
index d35775e6d09ad..1260953e94abf 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php
@@ -46,7 +46,7 @@ protected function processValue($value, $isRoot = false)
             $resolvedArguments = array();
 
             foreach ($arguments as $key => $argument) {
-                if (is_int($key)) {
+                if (is_int($key) || 0 === strpos($key, 'index_')) {
                     $resolvedArguments[] = $argument;
                     continue;
                 }