Exhibit 4.2.2

AMENDMENT NO. 2 TO THE

AMENDED AND RESTATED

DECLARATION OF TRUST AND TRUST AGREEMENT

OF

DB US DOLLAR INDEX MASTER TRUST

This Amendment No. 2 (Amendment No. 2) to the Amended and Restated Declaration of Trust and Trust Agreement
dated as of January 31, 2007 (the Declaration of Trust) of DB US Dollar Index Master Trust (the Master Trust) by and among DB Commodity Services LLC (the Managing Owner), Wilmington Trust
Company and PowerShares DB US Dollar Index Trust.

WHEREAS, the Managing Owner has obtained the written approval of
each series of PowerShares DB US Dollar Index Trust to amend the Declaration of Trust to memorialize changes in certain fee provisions disclosed in the Declaration of Trust; and

WHEREAS, the Managing Owner wishes to amend the Declaration of Trust pursuant to Section 11.1(a) thereof to give effect to the
foregoing.

NOW, THEREFORE, in consideration of the premises and of other good and valuable consideration, the receipt
and sufficiency of all of which are hereby acknowledged, the Declaration of Trust is amended as follows:



| | 1. | Effective as of January 4, 2010, Section 4.9 shall be amended and replaced in its entirety as follows:
| | -- | ------------------------------------------------------------------------------------------------------

SECTION 4.9. Compensation to the Managing Owner. The Managing Owner shall be entitled to compensation for its services as
managing owner of the Master Trust as set forth in the Prospectus.



| | 2. | This Amendment No. 2 to the Declaration of Trust shall be governed by, and construed in accordance with, the laws of the State of Delaware.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------



| | 3. | Terms used but not otherwise defined herein shall have the meaning ascribed to such term in the Declaration of Trust, as amended.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------





Remainder of page left blank intentionally.



---

IN WITNESS WHEREOF, this Amendment No. 2 has been executed
for and on behalf of the undersigned effective as of the 4thday of January, 2010.



DB COMMODITY SERVICES LLC, as Managing OwnerBy:

/s/ Martin KremensteinName: Martin Kremenstein Title:   Chief Operating Officer






By:

/s/ Michael GilliganName: Michael Gilligan Title:   Principal Financial Officer




Acknowledged:

|                                                                                                   |  |                                             
|-------------------------------------------------------------------------------------------------- |  | --------------------------------------------
|WILMINGTON TRUST COMPANY, not in its individual capacity but solely as Trustee of the Master Trust
|                                                                                                   | 
|By:                                                                                                |  | /s/ Joseph B. Feil                          
|                                                                                                   |  | Name: Joseph B. Feil Title:
  Vice President