The quickest way is to change the information for \autoref which is stored in a macro named \chapterautorefname, defaulting to chapter by redefinition into being Chapter then.
Please note that any defined autoref information is stored in \Xautorefname, where X is the name of the underlying counter, e.g chapter, part etc.
A more flexible way is to use \usepackage{cleveref} after loading hyperref and replace \autoref{int} by \Cref{int}.
\documentclass{report}
\usepackage{hyperref}
\renewcommand{\chapterautorefname}{Chapter}
\begin{document}
\chapter{Intro}\label{int}
HE First \autoref{int}
\chapter{Next One}
\end{document}

listingsenvironments. How does that apply here? – cfr Jan 08 '18 at 03:59