Exhibit 10.3

UNITED STATES HEATING OIL FUND, LP

AMENDMENT NO. 1 TO MARKETING AGENT AGREEMENT

This Amendment No. 1 dated as of July 30, 2012 to the Marketing Agent Agreement, by and among United States Heating Oil Fund, LP, a Delaware limited partnership (the “Fund”), United States Commodity Funds LLC, formerly Victoria Bay Asset Management, LLC, a Delaware limited liability company, as General Partner of the Fund (the “General Partner”) and ALPS Distributors, Inc., a Colorado corporation (the “Marketing Agent”).

WITNESSETH

WHEREAS, the Fund, the General Partner and the Marketing Agent entered into a Marketing Agent Agreement dated as of March 10, 2008 (the “Agreement”); and

WHEREAS, the Fund, the General Partner and the Marketing Agent wish to amend the Marketing Agent Agreement.

NOW, THEREFORE, in consideration of the mutual covenants and agreement herein contained, the Fund, General Partner and the Marketing Agent hereby agree as follows:

Name of the Fund; License. Effective August 1, 2012 and for the term of this Agreement, the General Partner shall cause the name of the Fund to be “United States Diesel-Heating Oil Fund, LP.”

United States Commodity Funds LLC

1999 Harrison Street, Suite 1530

Oakland, California 94612

[SIGNATURES ON FOLLOWING PAGE]

IN WITNESS WHEREOF, each of the parties hereto has caused this Amendment No. 1 to be duly executed as of the date first written above.

UNITED STATES HEATING OIL FUND, LP

By: United States Commodity Funds LLC,

        as General Partner