FS KKR Capital (FSK) 10-K 2016 FY Annual report

Exhibit 32.2

CERTIFICATION of CFO PURSUANT TO

Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350)

In connection with the Annual Report onForm 10-K for the year ended December 31, 2016 (the “Report”) of FS Investment Corporation (the “Registrant”), as filed with the Securities and Exchange Commission on the date hereof, I, William Goebel, the Chief Financial Officer of the Registrant, hereby certify, to the best of my knowledge, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Dated: March 1, 2017

/s/ William Goebel

William Goebel

Chief Financial Officer