Tommy Black has returned to
The midfielder had made six appearances for City since signing for them last month, but was sent back to Palace after cracking a rib during a match.
The injury comes as a disappointment to Bantams manager Colin Todd, who had been hoping to extend Black's loan by another month.
“Unfortunately the deal's dead now,” said Todd. “It's a real shame but he's going to be out for a significant time so there is no point in him staying with us.
“He had an X-ray on Sunday which didn't show anything but another one yesterday revealed a crack which will take a while to heal.
“It is a blow to lose Tommy because he has made a significant impact since he first came as he got fitter and fitter.”