diff --git a/ad_manager.module b/ad_manager.module
index 6ddeb35..b3259bd 100644
--- a/ad_manager.module
+++ b/ad_manager.module
@@ -165,7 +165,7 @@ function ad_manager_settings_form() {
 function ad_manager_theme($existing, $type, $theme, $path) {
   return array(
     'ad_manager_ad' => array(
-      'arguments' => array('name' => NULL),
+      'variables' => array('name' => NULL),
     ),
   );
 }