# error of symbol not available in ot1

I'm writing a manuscript for an Elsevier journal, and when I try to type in a per mille sign using \textperthousand an error comes up saying command \textperthousand unavailable in encoding OT1. Does anyone know how to get around this?

Switch to T1-encoding:

\documentclass{article}
\usepackage[T1]{fontenc}
\begin{document}
\textperthousand
\end{document}


Use the text companion fonts:

 \documentclass{article}
\usepackage{textcomp}
\begin{document}
\textperthousand
\end{document}


Advantage over the T1 fonts: In the text companion fonts there is a ready-made \textperthousand, it will also work in typewriter fonts.