"Although Vyse's publication leaves little doubt that the Dream Stela does indeed refer to Khafre, the implications for the age of the Sphinx are less easily determined. The broken text makes no reference to Khafre as the builder of the Sphinx. In fact the text was so badly damaged that the basis for the reference to Khafre remains completely obscure. The Dream Stela does not, therefore, provide the strong case for Khafre as the builder of the Sphinx that some would argue."
and the Stela of Amenhotep II seems to refer to the Sphinx sanctuary as "Haremakhet", although it also mentions both Khafre and Khufu.