The text 'figure' being printed under captions in IEEEtran

Question

Under \documentclass[conference]{IEEEtran}, whenever I include a caption under a figure, right below the caption, the text 'figure' is printed. This does not happen under \documentclass{article}. Running the following code, I get the problem:

\documentclass[conference]{IEEEtran}
\usepackage{graphicx,caption}
\begin{document}

\begin{figure}
\includegraphics{figures/saturation}
\caption{Caption here.}
\end{figure}

\end{document}

Here's a screenshot of the problem:

This is the format suggested here. Any help is appreciated.