Dei Filius, On Faith and Reason, Canon 3

3. If any one shall assert it to be possible that sometimes, according to the progress of science, a sense is to be given to doctrines propounded by the Church different from that which the Church has understood and understands: let him be anathema.

Translation: Henry Edward Manning, Petri Privilegium (1871), reproduced in Philip Schaff, Creeds of Christendom II, via CCEL.