diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index fabb1e1aa3..b96024e4e3 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -3707,7 +3707,7 @@ function page_header($page_title = '', $display_online_list = true)
 
 		'T_THEME_PATH'			=> "{$phpbb_root_path}styles/" . $user->theme['theme_path'] . '/theme',
 		'T_TEMPLATE_PATH'		=> "{$phpbb_root_path}styles/" . $user->theme['template_path'] . '/template',
-		'T_SUPER_TEMPLATE_PATH'	=> (isset($user->theme['template_inherit_path'])) ? "{$phpbb_root_path}styles/" . $user->theme['template_inherit_path'] . '/template' : '',
+		'T_SUPER_TEMPLATE_PATH'	=> (isset($user->theme['template_inherit_path']) && $user->theme['template_inherit_path']) ? "{$phpbb_root_path}styles/" . $user->theme['template_inherit_path'] . '/template' : "{$phpbb_root_path}styles/" . $user->theme['template_path'] . '/template',
 		'T_IMAGESET_PATH'		=> "{$phpbb_root_path}styles/" . $user->theme['imageset_path'] . '/imageset',
 		'T_IMAGESET_LANG_PATH'	=> "{$phpbb_root_path}styles/" . $user->theme['imageset_path'] . '/imageset/' . $user->data['user_lang'],
 		'T_IMAGES_PATH'			=> "{$phpbb_root_path}images/",