diff --git a/src/Symfony/Component/DependencyInjection/Dumper/Preloader.php b/src/Symfony/Component/DependencyInjection/Dumper/Preloader.php
index f9d2716e7d..fb39645022 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/Preloader.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/Preloader.php
@@ -85,7 +85,7 @@ class Preloader
                     self::preloadType($p->getType(), $preloaded);
                 }
 
-                self::preloadType($p->getReturnType(), $preloaded);
+                self::preloadType($m->getReturnType(), $preloaded);
             }
         } catch (\ReflectionException $e) {
             // ignore missing classes