The default `\copyright` command produces a surprisingly ugly symbol as soon as you use the beamer package:

[![ugly symbol](https://i.stack.imgur.com/ROJVT.jpg)](https://i.stack.imgur.com/ROJVT.jpg)

Is there a way to change it, e.g. to the one that is used in the article class?

A MWE is very short:

```
\documentclass{beamer}
\begin{document}
\copyright
\end{document}

```