diff --git a/include/class.cron.php b/include/class.cron.php
index e545c5afb7acddf48a97f6e9c0b05b252c5ac116..1db5a9f37b4187488455276c9f290382250ad596 100644
--- a/include/class.cron.php
+++ b/include/class.cron.php
@@ -56,7 +56,7 @@ class Cron {
         $chance = rand(1,2000);
         switch ($chance) {
         case 42:
-            @db_query('OPTIMIZE TABLE '.LOCK_TABLE);
+            @db_query('OPTIMIZE TABLE `'.LOCK_TABLE.'`');
             break;
         case 242:
             @db_query('OPTIMIZE TABLE '.SYSLOG_TABLE);