Index: filters/spam_filter_duplicate/spam_filter_duplicate.module
===================================================================
--- filters/spam_filter_duplicate/spam_filter_duplicate.module	(revision 6030)
+++ filters/spam_filter_duplicate/spam_filter_duplicate.module	(working copy)
@@ -377,7 +377,7 @@
   // how many rows we've got (so we can't do our own processing in PHP and
   // still get paging to work properly).
   $sql = "SELECT * FROM (SELECT DISTINCT x.hostname, x.timestamp, COUNT(x.hostname) AS count FROM (SELECT timestamp, hostname FROM {spam_tracker} WHERE score > %d ORDER BY timestamp DESC) AS x GROUP BY x.hostname) AS y WHERE y.count >= %d";
-  $arguments = array(variable_get('spam_threshold', SPAM_DEFAULT_THRESHOLD), variable_get('spam_blacklist_ip', SPAM_FILTER_DUPLICATE_DEFAULT_BLACKLIST));
+  $arguments = array(variable_get('spam_threshold', SPAM_DEFAULT_THRESHOLD), variable_get('spam_filter_duplicate_blacklist', SPAM_FILTER_DUPLICATE_DEFAULT_BLACKLIST));
 
   $count_sql = preg_replace('/^SELECT \* /', 'SELECT count(hostname) ', $sql);