diff --git a/htmlmail.admin.inc b/htmlmail.admin.inc
index da6cd58..72a6bfc 100644
--- a/htmlmail.admin.inc
+++ b/htmlmail.admin.inc
@@ -159,7 +159,11 @@ function htmlmail_admin_settings() {
           '!theme_system' => 'http://drupal.org/documentation/theme',
         )
       ) :
-      t('If you install and enable the <a href="!echo">Echo</a> module, the theme you select will also be used to style your messages as if they were pages on your website.')
+      t('If you install and enable the <a href="!echo">Echo</a> module, the theme you select will also be used to style your messages as if they were pages on your website.',
+        array(
+          '!echo' => 'http://drupal.org/project/echo'
+        )
+      )
     )
     . '</p><p>'
     . (module_exists('mailmime') ?