diff --git a/README.md b/README.md
index 95d5947e..8470aa90 100755
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ In this case, you will have to register the autoloader.
 
 ```php
 require_once 'path/to/PhpWord/src/PhpWord/Autoloader.php';
-PhpOffice\PhpWord\Autoloader::register();
+\PhpOffice\PhpWord\Autoloader::register();
 ```
 
 ## Basic usage
diff --git a/samples/Sample_Header.php b/samples/Sample_Header.php
index b61e415a..c6431c03 100644
--- a/samples/Sample_Header.php
+++ b/samples/Sample_Header.php
@@ -9,7 +9,7 @@ define('SCRIPT_FILENAME', basename($_SERVER['SCRIPT_FILENAME'], '.php'));
 define('IS_INDEX', SCRIPT_FILENAME == 'index');
 
 require_once '../src/PhpWord/Autoloader.php';
-PhpOffice\PhpWord\Autoloader::register();
+\PhpOffice\PhpWord\Autoloader::register();
 
 // Return to the caller script when runs by CLI
 if (CLI) {
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index c25aeac9..eb23221e 100755
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -42,4 +42,4 @@ spl_autoload_register(function ($class) {
 });
 
 require_once __DIR__ . "/../src/PhpWord/Autoloader.php";
-PhpOffice\PhpWord\Autoloader::register();
+\PhpOffice\PhpWord\Autoloader::register();