diff --git a/system/libs/pot/OTS_DB_MySQL.php b/system/libs/pot/OTS_DB_MySQL.php
index c52d9415..155fb902 100644
--- a/system/libs/pot/OTS_DB_MySQL.php
+++ b/system/libs/pot/OTS_DB_MySQL.php
@@ -145,9 +145,9 @@ class OTS_DB_MySQL extends OTS_Base_DB
 		global $config;
 
 	    if(class_exists('Cache') && ($cache = Cache::getInstance()) && $cache->enabled()) {
-			$cache->set('database_tables', serialize($this->has_table_cache));
-			$cache->set('database_columns', serialize($this->has_column_cache));
-			$cache->set('database_checksum', serialize(sha1($config['database_host'] . '.' . $config['database_name'])));
+			$cache->set('database_tables', serialize($this->has_table_cache), 3600);
+			$cache->set('database_columns', serialize($this->has_column_cache), 3600);
+			$cache->set('database_checksum', serialize(sha1($config['database_host'] . '.' . $config['database_name'])), 3600);
 		}
 
 		if($this->logged) {