5.5-beta build error: GL_PATCH_VERTICES

trying to build 5.5-beta on osx against the osx10.8 sdk, we get the following build error:

error 16-May-2015 12:45:54 /Volumes/build/bamboo-build/THIRDP-QT-BUILDMAC/qt3d/src/render/backend/qgraphicshelpergl3.cpp:125:36: error: use of undeclared identifier 'GL_PATCH_VERTICES'
error 16-May-2015 12:45:54 m_tessFuncs->glPatchParameteri(GL_PATCH_VERTICES, verticesPerPatch);
error 16-May-2015 12:45:54 ^
error 16-May-2015 12:45:54 /Volumes/build/bamboo-build/THIRDP-QT-BUILDMAC/qt3d/src/render/backend/qgraphicshelpergl3.cpp:118:52: warning: unused parameter 'verticesPerPatch' [-Wunused-parameter]
error 16-May-2015 12:45:54 void QGraphicsHelperGL3::setVerticesPerPatch(GLint verticesPerPatch)
error 16-May-2015 12:45:54