Form of Exhibit (g)(37)

LETTER AGREEMENT

April 30, 2014

Steven Bennett, Esq.
State Street Bank and Trust Company
Global Investor Services Group
2 Avenue de Lafayette LCC/2S
Boston, Massachusetts 02111

Dear Mr. Bennett:

Please be advised that Janus Investment Fund (the “Trust”) has established Janus Unconstrained Bond Fund, a new series of the Trust, effective on or about May 27, 2014. Pursuant to the existing Amended and Restated Custodian Contract between the Trust and State Street Bank and Trust Company (“State Street”), the Trust requests confirmation that State Street will act as custodian for this new series under the terms of the contract.

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

JANUS INVESTMENT FUND
By:
	Stephanie Grauerholz-Lofton
	Vice President and Secretary
STATE STREET BANK AND TRUST COMPANY
By:
Agreed to this     day of       2014