Problem mit "toc=bib"

\documentclass[toc=bib]{scrartcl}
\usepackage{biblatex}
\addbibresource{biblatex-examples.bib}
\begin{document}
\tableofcontents
 
\nocite{*}
\printbibliography
\end{document}

Liefert als Titel für die Bibliografie "totoc". Benutze ich toc=bibnumbered funktioniert es. Es erscheint dann 1 References

Aktuelles TeXLive2017

 *File List*
scrartcl.cls    2017/10/13 v3.25.2685 KOMA-Script document class (article)
scrkbase.sty    2017/10/13 v3.25.2685 KOMA-Script package (KOMA-Script-dependen
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 scrbase.sty    2017/10/13 v3.25.2685 KOMA-Script package (KOMA-Script-independ
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scrlfile.sty    2017/10/13 v3.25.2685 KOMA-Script package (loading files)
tocbasic.sty    2017/10/13 v3.25.2685 KOMA-Script package (handling toc-files)
scrsize11pt.clo    2017/10/13 v3.25.2685 KOMA-Script font size class option (11
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typearea.sty    2017/10/13 v3.25.2685 KOMA-Script package (type area)
biblatex.sty    2017/11/21 v3.9 programmable bibliographies (PK/JW/AB)
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kvsetkeys.sty    2016/05/16 v1.17 Key value parser (HO)
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blx-compat.def    2017/11/21 v3.9 biblatex compatibility (PK/JW/AB)
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standard.bbx    2017/11/21 v3.9 biblatex bibliography style (PK/JW/AB)
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