--- /linkchecker/linkchecker.install	Mon Jan 02 08:56:06 2012
+++ /var/www/example.com/public_html/sites/all/modules/linkchecker/linkchecker.install	Tue Jan 03 11:18:03 2012
@@ -377,7 +377,7 @@
       '0' => 'smileys',
     ),
   );
-
+  drupal_load('module', 'linkchecker');
   $linkchecker_filter_blacklist = variable_get('linkchecker_filter_blacklist', explode('|', LINKCHECKER_DEFAULT_FILTER_BLACKLIST));
   $linkchecker_filter_blacklist = array_values($linkchecker_filter_blacklist);
   $linkchecker_filter_blacklist = array_filter($linkchecker_filter_blacklist);