UsdGeomMesh has no member "GetPrimvar"

[msf567]

VtArray<GfVec2f> uvs;
auto uvAttr = mesh.GetPrimvar(TfToken("primvars:st")).GetAttr();

'GetPrimvar': is not a member of 'pxrInternal_v0_24__pxrReserved__::UsdGeomMesh'	

This is not properly linking against the method defined on line 202 of primvarAPI.h

The file is definitely included in my headers.

Interestingly, if I pull the function itself via UsdGeomPrimvarsAPI::GetPrimvar(), the compiler will recognize the function but of course will complain because it is not a static function.

What is going on?

How can I pull the UVs from a UseGeomMesh?