LETTER AGREEMENT

Exhibit (g)(25)

LETTER AGREEMENT

July 12, 2011

Mr. Xxxxxxx Xxxxx
State Street Bank and Trust Company
Global Investor Services Group
0 Xxxxxx xx Xxxxxxxxx XXX0X
Xxxxxx, Xxxxxxxxxxxxx 00000

Dear Xx. Xxxxx:

This letter is to notify you that Janus Investment Fund (the “Trust”) will change the name of Janus Dynamic Allocation Fund to Janus World Allocation Fund (the “Fund”), effective September 30, 2011. The Trust requests confirmation that all references to “Janus Dynamic Allocation Fund” in the Amended and Restated Custodian Contract dated August 1, 2005, as amended, between the Trust and State Street Bank and Trust Company (“State Street”) (the “Custodian Contract”), shall be replaced with “Janus World Allocation Fund,” and that State Street will continue to act as custodian for the Fund under the terms of the Custodian Contract.

Please indicate your acceptance of the foregoing by executing two copies of this letter, returning one copy to the Trust and retaining one copy for your records.

JANUS INVESTMENT FUND
By:		/s/ Xxxxxxxxx Xxxxxxxxxx-Xxxxxx Xxxxxxxxx Xxxxxxxxxx-Xxxxxx
		Vice President and Secretary
STATE STREET BANK AND TRUST COMPANY
By:		/s/ Xxxxxxx X. Xxxxxx Xxxxxxx X. Xxxxxx, Executive Vice President

Agreed to this 27th      day of July    , 2011.