EX-99.1

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a Statement on Schedule 13G (including any and all amendments thereto) with respect to the Common Shares, par value $0.01 per share, of Ocean Rig UDW Inc., a Republic of the Marshall Islands corporation, and further agree that this Joint Filing Agreement shall be included as an Exhibit to such joint filings.

The undersigned further agree that each party hereto is responsible for the timely filing of such Statement on Schedule 13G and any amendments thereto, and for the accuracy and completeness of the information concerning such party contained therein; provided, however, that no party is responsible for the accuracy or completeness of the information concerning any other party, unless such party knows or has reason to believe that such information is inaccurate.

This Joint Filing Agreement may be signed in counterparts with the same effect as if the signature on each counterpart were upon the same instrument.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of February 13, 2015.



HIGHLAND FUNDS II, on behalf of its series Highland Global Allocation Fund

	By:	/s/ Dustin Norris
		Name: Dustin Norris
		Title: Assistant Treasurer

HIGHLAND CAPITAL MANAGEMENT FUND ADVISORS, L.P.

By: Strand Advisors XVI, Inc., its general partner

	By:	/s/ Ethan Powell
		Name: Ethan Powell
		Title: Secretary

STRAND ADVISORS XVI, INC.

	By:	/s/ Ethan Powell
	Name:	Ethan Powell
	Title:	Secretary

NEXPOINT CREDIT STRATEGIES FUND

	By:	/s/ Ethan Powell
	Name:	Ethan Powell
	Title:	President

NEXPOINT ADVISORS, L.P.

By: NexPoint Advisors GP, LLC, its general partner

	By:	/s/
		Name: Ethan Powell
		Title: President


HIGHLAND CAPITAL MANAGEMENT, L.P.

By: Strand Advisors, Inc., its general partner

By:		/s/ James D. Dondero
		Name: James D. Dondero
		Title: President

STRAND ADVISORS, INC.

By:		/s/ James D. Dondero
Name:		James D. Dondero
Title:		President

/s/ James D. Dondero
James D. Dondero


NEXPOINT ADVISORS GP, LLC

	By:	/s/ Ethan Powell
	Name:	Ethan Powell
	Title:	President