GLUT referencing issue

I'm running into a GLUT compile error, can't find GL/glut.h:

Severity Code Description Project File Line Suppression State Error (active) E1696 cannot open source file "GL/glut.h" vtkRenderingExternalCxxTests C:\Users\john.m.vines\Documents\VTK\Unity-VTK\src\vtk\Rendering\External\Testing\Cxx\TestGLUTRenderWindow.cxx 32

It wasn't clear to me if I can use FreeGLUT or the older GLUT package? Any help is appreciated, thank you!!