tag 830564 + pending thanks > Manually updating to the current upstream version of biblatex-ieee > from CTAN, version 2016/06/27, fixed the problem for me. The updated version is already in upstream TL and thus will be in the next checkout/upload of the packages. Norbert -- PREINING Norbert + TeX Live & Debian Developer + http://www.preining.info GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13