Exhibit (g)(21)

                                   AMENDMENT
                                      TO
                              CUSTODIAN AGREEMENT

      THIS AMENDMENT TO CUSTODIAN AGREEMENT (this "Amendment") is made as of
August 8, 2017 by and between (i) each of the funds listed on Appendix A to the
Agreement (as defined below) and each of the funds on behalf of each of its
portfolios (if any, and which may be listed on Appendix A and updated from time
to time), in each case, severally and not jointly (each, a "Fund" and
collectively, the "Funds"), and (iii) BROWN BROTHERS HARRIMAN & CO. (the
"Custodian" or "BBH&Co."). All capitalized terms used but not defined herein
shall have the meanings set forth in the Agreement.

      WHEREAS, certain Funds and the Custodian entered into a Custodian
Agreement, dated as of September 14, 2009, (the "Original Agreement");

      WHEREAS, pursuant to a Novation and Amendment Agreement dated December 7,
2011, AllianceBernstein Cap Fund, Inc. on behalf of its series AllianceBernstein
Select US Equity Portfolio and AllianceBernstein Bond Fund, Inc. on behalf of
its series AllianceBernstein International Bond Portfolio became parties to the
Original Agreement (as amended and novated, the "Agreement"); and

      WHEREAS, in accordance with Section 12.2 of the Agreement, the Funds and
the Custodian desire to amend the Agreement as set forth herein.

      NOW, THEREFORE, in consideration of the mutual agreements herein contained
and other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged by the parties, the Trust and the Custodian hereby agree
as follows:

1. The parties acknowledge that under the Novation and Amendment Agreement,
Appendix A of the Novation and Amendment Agreement amended and restated the Fund
Appendix of the Original Agreement, and each of the funds listed thereon and
each of the funds on behalf of the referenced portfolios listed thereon,
severally and not jointly, are referred to in the Agreement as a "Fund" and
collectively, the "Funds".

2. The Agreement is hereby further amended by deleting Appendix A thereto in its
entirety and substituting, in its place, the updated Appendix A attached hereto.

3. As amended hereby, all terms and provisions of the Agreement are hereby
ratified and affirmed as of the date hereof and are hereby extended to give
effect to the terms hereof.

4. This Amendment may be executed in any number of counterparts each of which
shall be deemed to be an original, but all of which together shall constitute
one and the same Amendment.

5. This Amendment, together with the Agreement, constitutes the entire agreement
of the parties with respect to its subject matter and supersedes all oral
communications and prior writings with respect hereto. Except as expressly
modified hereby, the Agreement shall continue in full force and effect in
accordance with its terms and conditions.

6. Delivery of an executed counterpart of this Amendment or any certificate
delivered thereunder, by facsimile transmission or other electronic mail
transmission (e.g. ".pdf' or ".tif') shall be effective as delivery of a
manually executed counterpart of this Amendment or any certificate delivered
thereunder.

7. This Amendment shall be construed in accordance the governing law and
exclusive jurisdiction provisions of the Agreement.

                           [Signature Page Follows]



      IN WITNESS WHEREOF, each of the undersigned parties has executed this
Amendment to Custodian Agreement effective as of the date first above written.

BROWN BROTHERS HARRIMAN & CO.

By:     /s/ Elizabeth E. Prickett
        ---------------------------------
Name:   Elizabeth E. Prickett
Title:  Managing Director
Date:


EACH FUND SET FORTH ON APPENDIX A HERETO, SEVERALLY AND NOT JOINTLY

By:     /s/ Stephen J. Laffey
        ---------------------------------
Name:   Stephen J. Laffey
Title:  Assistant Secretary
Date:   August 8, 2017



                                 APPENDIX A
          To the Custodian Agreement dated as of September 14, 2009
                          Effective August 8, 2017
or in respect of Funds/Portfolios marked with a "*", the corresponding earlier
                               date noted below

AB Global Bond Fund, Inc. (f/k/a AllianceBernstein Global Bond Fund)

AB Global Real Estate Investment Fund, Inc. (f/k/a AllianceBernstein Global Real
Estate Investment Fund)

AB High Income Fund, Inc. (f/k/a AllianceBernstein High Income Fund)

AB International Growth Fund, Inc. (f/k/a AllianceBernstein International Growth
Fund)

AB Unconstrained Bond Fund, Inc. (f/k/a AllianceBernstein Unconstrained Bond
Fund)

AllianceBernstein Global High Income Fund, Inc.



AB Cap Fund, Inc. (f/k/a AllianceBernstein Cap Fund) on behalf of the following
portfolios:

AB Asia Ex-Japan Equity Portfolio (*July 28, 2015)

AB Emerging Markets Core Portfolio (*April 4, 2014)

AB Emerging Markets Multi-Asset Portfolio (f/k/a AllianceBernstein Emerging
Markets Multi-Asset Portfolio)

AB FlexFee Emerging Markets Growth Portfolio (*April 4, 2014)

AB FlexFee Core Opportunities Portfolio (*May 19, 2017)

AB FlexFee International Strategic Core Portfolio (*May 17, 2017)

AB FlexFee Large Cap Growth Portfolio (*May 19, 2017)

AB FlexFee US Thematic Portfolio (*May 19, 2017)

AB Global Core Equity Portfolio (*October 13, 2014)

AB International Strategic Core Portfolio (*June 26, 2015)

AB Select US Equity Portfolio (f/k/a AllianceBernstein Select US Equity
Portfolio)



AB Bond Fund, Inc. (f/k/a AllianceBernstein Bond Fund) on behalf of the
following portfolios:

AB FlexFee International Bond Portfolio (f/k/a AB Performance Series --
International Bond Portfolio)