diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 8d5af43..d914770 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -3186,7 +3186,7 @@ function drupal_common_theme() {
     ),
     'progress_bar' => array(
       'variables' => array('percent' => NULL, 'message' => NULL),
-      'template' => 'progress_bar',
+      'template' => 'progress-bar',
     ),
     'indentation' => array(
       'variables' => array('size' => 1),