diff --git a/src/Application.php b/src/Application.php
index 21ffc6c369..4872a7794b 100644
--- a/src/Application.php
+++ b/src/Application.php
@@ -79,7 +79,7 @@ public function configureGlobalOptions()
 
         $this->getDefinition()
             ->addOption(
-                new InputOption('--root', '-r', InputOption::VALUE_REQUIRED, 'The Drupal root for this site.')
+                new InputOption('--root', '-r', InputOption::VALUE_REQUIRED, 'The Drupal root for this site. Note: this option is deprecated and will be removed. ')
             );