Index: core/install.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- core/install.php	(revision 15919)
+++ core/install.php	(revision )
@@ -1345,6 +1345,7 @@
 
 		function ConnectToDatabase()
 		{
+			include_once FULL_PATH . '/core/kernel/db/i_db_connection.php';
 			include_once FULL_PATH . '/core/kernel/db/db_connection.php';
 
 			$required_keys = Array ('DBType', 'DBUser', 'DBName');