JOINT FILING AGREEMENT

EXHIBIT 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that this Statement on Schedule 13D relating to the Common Stock, $0.0001 par value, of Biocryst Pharmaceuticals, Inc. is being filed with the Securities and Exchange Commission on behalf of each of them.

August 2, 2013

	XXXXX BROS. ADVISORS LP
	By:	Xxxxx Bros. Advisors (GP) LLC, its general partner
	By:	/s/ Xxxxx X. Xxxxxxx
		Name: Xxxxx X. Xxxxxxx Title: President

	XXXXX BROS. ADVISORS (GP) LLC
	By:	/s/ Xxxxx X. Xxxxxxx
		Name: Xxxxx X. Xxxxxxx Title: President
		/s/ Xxxxxx X. Xxxxx
		Xxxxxx X. Xxxxx
		/s/ Xxxxx X. Xxxxx
		Xxxxx X. Xxxxx

	FBB Associates
	By:	/s/ Xxxxxx X. Xxxxx
		Name: Xxxxxx X. Xxxxx Title: Partner