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-rw-r--r--includes/module.inc1
1 files changed, 1 insertions, 0 deletions
diff --git a/includes/module.inc b/includes/module.inc
index 28bca2350..c07ec632a 100644
--- a/includes/module.inc
+++ b/includes/module.inc
@@ -181,6 +181,7 @@ function system_list($type) {
foreach ($lists['theme'] as $key => $theme) {
if (!empty($theme->info['base theme'])) {
// Make a list of the theme's base themes.
+ require_once DRUPAL_ROOT . '/includes/theme.inc';
$lists['theme'][$key]->base_themes = drupal_find_base_themes($lists['theme'], $key);
// Don't proceed if there was a problem with the root base theme.
if (!current($lists['theme'][$key]->base_themes)) {