diff --git a/boost.module b/boost.module
index eb5397607a74c073c4c45fc34a5a5cfe1a553114..703c32dd0ee05759a0e09c5dd598f806095fa4ca 100644
--- a/boost.module
+++ b/boost.module
@@ -6260,10 +6260,10 @@ function boost_crawler_prune_table($expire) {
   }
 
   if ($expire && BOOST_LOOPBACK_BYPASS) {
-    db_query("DELETE FROM {boost_crawler} cr WHERE cr.hash IN (SELECT ca.hash_url FROM {boost_cache} ca WHERE ca.expire BETWEEN 1 AND 434966399 OR ca.expire > %d)", BOOST_TIME);
+    db_query("DELETE FROM {boost_crawler} WHERE hash IN (SELECT ca.hash_url FROM {boost_cache} ca WHERE ca.expire BETWEEN 1 AND 434966399 OR ca.expire > %d)", BOOST_TIME);
   }
   else {
-    db_query("DELETE FROM {boost_crawler} cr WHERE cr.hash IN (SELECT ca.hash_url FROM {boost_cache} ca WHERE ca.expire BETWEEN 1 AND 434966399 OR ca.expire > 434966400)");
+    db_query("DELETE FROM {boost_crawler} WHERE hash IN (SELECT ca.hash_url FROM {boost_cache} ca WHERE ca.expire BETWEEN 1 AND 434966399 OR ca.expire > 434966400)");
   }
 
   variable_set('boost_crawl_prune_table', TRUE);