diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 822ac5b8d6..b50860c6c3 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -4557,9 +4557,9 @@ function page_header($page_title = '', $display_online_list = true, $item_id = 0
 		'S_SEARCH_HIDDEN_FIELDS'	=> build_hidden_fields($s_search_hidden_fields),
 
 		'T_ASSETS_PATH'			=> "{$web_path}assets",
-		'T_THEME_PATH'			=> "{$web_path}styles/" . $user->theme['theme_path'] . '/theme',
-		'T_TEMPLATE_PATH'		=> "{$web_path}styles/" . $user->theme['template_path'] . '/template',
-		'T_SUPER_TEMPLATE_PATH'	=> (isset($user->theme['template_inherit_path']) && $user->theme['template_inherit_path']) ? "{$web_path}styles/" . $user->theme['template_inherit_path'] . '/template' : "{$web_path}styles/" . $user->theme['template_path'] . '/template',
+		'T_THEME_PATH'			=> "{$web_path}styles/" . rawurlencode($user->theme['theme_path']) . '/theme',
+		'T_TEMPLATE_PATH'		=> "{$web_path}styles/" . rawurlencode($user->theme['template_path']) . '/template',
+		'T_SUPER_TEMPLATE_PATH'	=> (isset($user->theme['template_inherit_path']) && $user->theme['template_inherit_path']) ? "{$web_path}styles/" . rawurlencode($user->theme['template_inherit_path']) . '/template' : "{$web_path}styles/" . rawurlencode($user->theme['template_path']) . '/template',
 		'T_IMAGES_PATH'			=> "{$web_path}images/",
 		'T_SMILIES_PATH'		=> "{$web_path}{$config['smilies_path']}/",
 		'T_AVATAR_PATH'			=> "{$web_path}{$config['avatar_path']}/",
@@ -4567,14 +4567,14 @@ function page_header($page_title = '', $display_online_list = true, $item_id = 0
 		'T_ICONS_PATH'			=> "{$web_path}{$config['icons_path']}/",
 		'T_RANKS_PATH'			=> "{$web_path}{$config['ranks_path']}/",
 		'T_UPLOAD_PATH'			=> "{$web_path}{$config['upload_path']}/",
-		'T_STYLESHEET_LINK'		=> "{$web_path}styles/" . $user->theme['theme_path'] . '/theme/stylesheet.css',
-		'T_STYLESHEET_LANG_LINK'    => "{$web_path}styles/" . $user->theme['theme_path'] . '/theme/' . $user->lang_name . '/stylesheet.css',
+		'T_STYLESHEET_LINK'		=> "{$web_path}styles/" . rawurlencode($user->theme['theme_path']) . '/theme/stylesheet.css',
+		'T_STYLESHEET_LANG_LINK'    => "{$web_path}styles/" . rawurlencode($user->theme['theme_path']) . '/theme/' . $user->lang_name . '/stylesheet.css',
 		'T_STYLESHEET_NAME'		=> $user->theme['theme_name'],
 
-		'T_THEME_NAME'			=> $user->theme['theme_path'],
+		'T_THEME_NAME'			=> rawurlencode($user->theme['theme_path']),
 		'T_THEME_LANG_NAME'		=> $user->data['user_lang'],
 		'T_TEMPLATE_NAME'		=> $user->theme['template_path'],
-		'T_SUPER_TEMPLATE_NAME'	=> (isset($user->theme['template_inherit_path']) && $user->theme['template_inherit_path']) ? $user->theme['template_inherit_path'] : $user->theme['template_path'],
+		'T_SUPER_TEMPLATE_NAME'	=> rawurlencode((isset($user->theme['template_inherit_path']) && $user->theme['template_inherit_path']) ? $user->theme['template_inherit_path'] : $user->theme['template_path']),
 		'T_IMAGES'				=> 'images',
 		'T_SMILIES'				=> $config['smilies_path'],
 		'T_AVATAR'				=> $config['avatar_path'],