diff --git a/manual/tracy.tex b/manual/tracy.tex
index e71a903b..3c9cb467 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -747,7 +747,7 @@ There are two ways you can run \texttt{vcpkg} to install the dependencies for Tr
 vcpkg\install_vcpkg_dependencies.bat
 \end{lstlisting}
 This writes files only to the \texttt{vcpkg\textbackslash{}vcpkg} directory and makes no other changes on your machine.
-\item System-wide installation with Manifest mode -- install \texttt{vcpkg} by following the instructions on its website, make sure that the environment variable \texttt{VCPKG_ROOT} is set to the path where you have clone the repository, and then execute the following command:
+\item System-wide installation with Manifest mode -- install \texttt{vcpkg} by following the instructions on its website, make sure that the environment variable \texttt{VCPKG\_ROOT} is set to the path where you have clone the repository, and then execute the following command:
 \begin{lstlisting}[language=sh]
 vcpkg integrate install
 \end{lstlisting}