{xe|lua}latex + svmono + newfloat + biblatex = ↯

Running xelatex or lualatex on

\documentclass{svmono}%%% V 5.6 from http://www.springer.com/gp/authors-editors/book-authors-editors/resources-guidelines/rights-permissions-licensing/manuscript-preparation/5636
\usepackage{newfloat}
\usepackage{biblatex}
\begin{document}
\end{document}

spits out the following error:

! Package biblatex Error: Patching \addtocontents failed.

See the biblatex package documentation for explanation. Type H for immediate help. ...

What would be a (permanent) bugfix?

Crossposts: http://latex.org/forum/viewtopic.php?t=32737, http://tex.stackexchange.com/questions/503543/xelualatex-svmono-newfloat-biblatex