diff --git a/chapters/functions.tex b/chapters/functions.tex
index c8a1b8a77..05ddd3132 100644
--- a/chapters/functions.tex
+++ b/chapters/functions.tex
@@ -544,7 +544,7 @@ \subsection{Functional Input Arguments to Functions}\label{functional-input-argu
 algorithm
   integral :=
     quadrature(x1, (x1 + x2) / 2, integrand) +
-      quadrature((x1 + x2) / 2, x2, integrand);
+    quadrature((x1 + x2) / 2, x2, integrand);
 end quadrature2;
 \end{lstlisting}
 \end{example}