SUPPLEMENT TO THE AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF RECKSON OPERATING PARTNERSHIP, L.P

Exhibit 3.12

SUPPLEMENT TO THE AMENDED AND RESTATED
AGREEMENT OF LIMITED PARTNERSHIP OF
RECKSON OPERATING PARTNERSHIP, L.P.

        In accordance with Sections 12.1 and 14.1B(2) of the Amended and Restated Agreement of Limited Partnership of Reckson Operating Partnership, L.P. (the " Partnership "), as amended (the " Partnership Agreement "), the Partnership Agreement is hereby supplemented (the " Supplement ") to admit Wyoming Acquisition GP LLC, a Delaware limited liability company (" Wyoming GP "), as the successor general partner to Reckson Associates Realty Corp., a Maryland corporation (" Reckson "). Capitalized terms used and not otherwise defined herein shall have the meanings set forth in the Partnership Agreement.

        WHEREAS, pursuant to that certain Assignment and Exchange Agreement dated January 25, 2007 by and among Reckson, SL Green Operating Partnership, L.P., a Delaware limited partnership, and Wyom