Freeport-McMoRan (FCX) 10-Q 2008 Q2 Quarterly report

Exhibit 10.25

June 13, 2008

The Honorable Gabrielle K. McDonald

2001 Holcombe Boulevard, #3201

Houston, Texas 77030

Dear Judge McDonald:

Supplemental Agreement to the

Consulting Agreement of November 1, 1999

This Supplemental Agreement refers to the consulting agreement of November 1, 1999 (the “Consulting Agreement”), with the undersigned, FM Services Company (the “Company”), with respect to your performance of consulting services for the Company and its subsidiaries and affiliates.

By way of this Supplemental Agreement, the Company would like to amend your Consulting Agreement, increasing your annual retainer to $300,000 effective as of May 1, 2008.  All other terms and conditions of the Consulting Agreement shall remain unchanged.

Please confirm that the foregoing correctly sets forth your understanding with respect to this matter by signing both originals of this Supplemental Agreement and returning one to me.

Very truly yours,

/s/ Richard C. Adkerson

Richard C. Adkerson

Chairman of the Board

FM Services Company

AGREED TO AND ACCEPTED:

BY:  /s/ Gabrielle K. McDonald

Gabrielle K. McDonald

DATE: June 23, 2008