[phenixbb] MSE gap

Hello, I seem to be having a problem with phenix.refine and the seleno-methionine residue (resname MSE). It seems that I have a gap in the peptide bond between the C atoms and the N atom of the subsequent residue. Is there something I could add to the restraints_edits.params file to get it to click together? What is the distance_ideal and sigma for a peptide bond? Thanks for your help, Troy