[en] The Fusion Materials Irradiation Test Facility (FMIT) is an accelerator-based source of high energy neutrons to be constructed at the Hanford Engineering Development Laboratory. It will be unique in featuring a sufficiently high flux to permit testing of fusion reactor materials at damage rates as high, or higher, than will be experienced in a commercial device. The neutron spectra in FMIT are different from those in a fusion device utilizing the D-T reaction; in particular, they include higher energy neutrons than produced in the D-T reaction. As a result, questions have been raised regarding possible difficulties in applying materials data obtained in FMIT. It is to those concerns that this note is addressed