diff --git a/modules/dblog/dblog.module b/modules/dblog/dblog.module
index 0dffb75db4a7b81c044c0b26f93d7907227d04df..04529d64aefe09f47c16d6f258ea0b956a5745e5 100644
--- a/modules/dblog/dblog.module
+++ b/modules/dblog/dblog.module
@@ -98,7 +98,7 @@ function dblog_init() {
 function dblog_cron() {
   // Cleanup the watchdog table
   $max = db_result(db_query('SELECT MAX(wid) FROM {watchdog}'));
-  db_query('DELETE FROM {watchdog} WHERE wid < %d', $max - variable_get('dblog_row_limit', 1000));
+  db_query('DELETE FROM {watchdog} WHERE wid <= %d', $max - variable_get('dblog_row_limit', 1000));
 }
 
 /**