diff --git a/phpBB/install/convertors/convert_phpbb20.php b/phpBB/install/convertors/convert_phpbb20.php
index a1acb32da7..0f17f0e2fe 100644
--- a/phpBB/install/convertors/convert_phpbb20.php
+++ b/phpBB/install/convertors/convert_phpbb20.php
@@ -428,7 +428,7 @@ if (!$get_info)
 				'target'		=> BANLIST_TABLE,
 
 				array('ban_ip',					'banlist.ban_ip',	''),
-				array('ban_userid',				'0',				''),
+				array('ban_userid',				0,					''),
 				array('ban_email',				'',					''),
 				array('ban_reason',				'',					''),
 				array('ban_give_reason',		'',					''),
diff --git a/phpBB/install/convertors/functions_phpbb20.php b/phpBB/install/convertors/functions_phpbb20.php
index 7f51b90787..6788ecd900 100644
--- a/phpBB/install/convertors/functions_phpbb20.php
+++ b/phpBB/install/convertors/functions_phpbb20.php
@@ -500,7 +500,7 @@ function phpbb_user_id($user_id)
 	// having mods installed (a poster id of 0 is not possible in 2.0.x). 
 	// Therefore, we return the user id "as is".
 
-	return $user_id;
+	return (int) $user_id;
 }
 
 /* Copy additional table fields from old forum to new forum if user wants this (for Mod compatibility for example)