diff --git a/date_views/theme/theme.inc b/date_views/theme/theme.inc
index 8c42a52..cb01e32 100644
--- a/date_views/theme/theme.inc
+++ b/date_views/theme/theme.inc
@@ -165,8 +165,8 @@ function theme_date_nav_title($params) {
   $date_info = $view->date_info;
   $link = !empty($params['link']) ? $params['link'] : FALSE;
   $format = !empty($params['format']) ? $params['format'] : NULL;
-  $format_with_year = variable_get('date_views_' . $granularity . 'format_with_year', 'l, F j, Y');
-  $format_without_year = variable_get('date_views_' . $granularity . 'format_without_year', 'l, F j');
+  $format_with_year = variable_get('date_views_' . $granularity . '_format_with_year', 'l, F j, Y');
+  $format_without_year = variable_get('date_views_' . $granularity . '_format_without_year', 'l, F j');
   switch ($granularity) {
     case 'year':
       $title = $date_info->year;