diff --git a/chapters/functions.tex b/chapters/functions.tex
index aaf2201d2..78fe67bb0 100644
--- a/chapters/functions.tex
+++ b/chapters/functions.tex
@@ -370,9 +370,9 @@ \section{Pure Modelica Functions}\doublelabel{pure-modelica-functions}
 model M // Assume sin, cos, asin are pure functions with normal derivatives.
   input Real x[2];
   input Real w;
-  Real y[2]=[cos(w),sin(w);-sin(w),cos(w)]*x;
-  Real z[2]=der (y);
-  Real a=0*asin(w);
+  Real y[2] = [cos(w), sin(w); -sin(w), cos(w)] * x;
+  Real z[2] = der(y);
+  Real a = 0 * asin(w);
 end M;
 \end{lstlisting}
 A tool only needs to generate one call of the pure function \lstinline!cos(w)!