diff --git a/wysiwyg_filter.pages.inc b/wysiwyg_filter.pages.inc
index ce2a02e..06c34a8 100644
--- a/wysiwyg_filter.pages.inc
+++ b/wysiwyg_filter.pages.inc
@@ -447,7 +447,12 @@ function _wysiwyg_filter_xss_attributes($attr, $element = '') {
               break;
             }
           }
-          if (($nofollow_policy == 'blacklist' && $domain_found) || ($nofollow_policy == 'whitelist' && !$domain_found)) {
+          // If we are doing a blacklist and found the domain, add a nofollow.
+          // If we are doing a whitelist and didn't find the domain AND it is
+          // not a relative link, add nofollow. Links are checked by
+          // http://php.net/parse_url.
+          $link_is_relative = empty(parse_url($attrinfo['value'], PHP_URL_HOST));
+          if (($nofollow_policy == 'blacklist' && $domain_found) || ($nofollow_policy == 'whitelist' && !$domain_found && !$link_is_relative)) {
             $add_nofollow = TRUE;
           }
         }