  Despite the many studies on stellar nucleosynthesis published so far, the
scenario for the production of Cu in stars remains elusive. In particular, it
is still debated whether copper originates mostly in massive stars or type Ia
supernovae. To answer this question, we compute self-consistent chemical
evolution models taking into account the results of updated stellar
nucleosynthesis. By contrasting copper evolution in Omega Cen and the Milky
Way, we end up with a picture where massive stars are the major responsible for
the production of Cu in Omega Cen as well as the Galactic disc.
