diff --git a/sections/tech_background.tex b/sections/tech_background.tex
index a57ebb4..3cf4117 100644
--- a/sections/tech_background.tex
+++ b/sections/tech_background.tex
@@ -10,7 +10,7 @@ used to display the state of the simulation on the screen.
 \subsection{Original project}
 
 Before starting to write any code, it was necessary to study carefully the
-original project. The starting point of chosen for this specific project was the
+original project. The starting point chosen for this specific project was the
 last commit on the \texttt{c++-port} branch. The reason for this choice is that
 the project originally started fully in C (which is still the case for the
 \texttt{main} branch) and C++ offers more functionalities that help for a
@@ -75,6 +75,7 @@ place in three steps:
 \begin{minipage}{.49\textwidth}
 	\centering
 	\includegraphics[width=0.8\textwidth]{cairo}
-	\captionof{figure}{Cairo's drawing model}
+	\captionof{figure}{Cairo's drawing model\protect\footnotemark}
 	\label{fig:cairo}
 \end{minipage}
+\footnotetext{Image taken from Wikipedia}