FROM is adding 1 to SQL..

Hi,

I have a problem with FROM. I am trying a join two tables, but the FROM function is adding 1 number to SQL sentences.

My codes : 

PHP Code:

$company = $ci->db->select('MUST.*, PERS.*')->from('musteriler as MUST')
                        ->join('ilgili_kisiler AS PERS', 'PERS.musteri_id = MUST.id', 'inner')
                        ->get_where(array('PERS.id' => $person_id)); 


Output:

Code:

SELECT `MUST`.*, `PERS`.* FROM (`musteriler` as `MUST`, 1) INNER JOIN `ilgili_kisiler` AS `PERS` ON `PERS`.`musteri_id` = `MUST`.`id`

You can see there is a 1 number in FROM ... 

How can I fix this ?