diff --git a/src/rg/injektor/generators/FileGenerator.php b/src/rg/injektor/generators/FileGenerator.php
index a828db5..42fd2c3 100644
--- a/src/rg/injektor/generators/FileGenerator.php
+++ b/src/rg/injektor/generators/FileGenerator.php
@@ -451,7 +451,7 @@ protected function getFactoryMethod(\ReflectionMethod $method, $classConfig) {
      */
     private function createProxyClass($proxyName) {
         $proxyClass = new Generator\ClassGenerator($proxyName);
-        $proxyClass->setExtendedClass('\\' . $this->fullClassName);
+        $proxyClass->setExtendedClass($this->fullClassName);
         foreach ($this->injectableArguments as $injectableArgument) {
             $injectorMethod = new \Zend\Code\Generator\MethodGenerator('propertyInjection' . $injectableArgument->getName());
             $injectorMethod->setBody($injectableArgument->getProcessingBody());