I am using the `commath` package to typeset the derivative operator "D" with the command `\Dif`. This work well *unless* I want to add subscripts or superscripts. In this case, the spacing after operator is too small and the exponent / index "touches" the operator:

![enter image description here](https://i.stack.imgur.com/STq8y.png)

where the first operator is created via `\Dif` and the second one via `\mathrm{D}` (full MWE see below).

Is there some way to "redefine" the `\Dif` command in order to fix the spacing?

---

```
\documentclass{article}
\usepackage{commath}

\begin{document}

\begin{align*}
  \Dif^2_x f(x) \\
  \mathrm{D}^2_x f(x)
\end{align*}

\end{document}

```