diff --git a/doc/generic/pgf/pgfmanual-en-tikz-coordinates.tex b/doc/generic/pgf/pgfmanual-en-tikz-coordinates.tex
index bf6047fc1..aedf0f648 100644
--- a/doc/generic/pgf/pgfmanual-en-tikz-coordinates.tex
+++ b/doc/generic/pgf/pgfmanual-en-tikz-coordinates.tex
@@ -380,11 +380,11 @@ \subsubsection{Node Coordinate System}
         Specifies an anchor of the node. Here is an example:
         %
 \begin{codeexample}[preamble={\usetikzlibrary{arrows.meta}}]
-\begin{tikzpicture}
-  \node (shape)   at (0,2)  [draw] {|class Shape|};
-  \node (rect)    at (-2,0) [draw] {|class Rectangle|};
-  \node (circle)  at (2,0)  [draw] {|class Circle|};
-  \node (ellipse) at (6,0)  [draw] {|class Ellipse|};
+\begin{tikzpicture}[node font=\ttfamily]
+  \node (shape)   at (0,2)  [draw] {class Shape};
+  \node (rect)    at (-2,0) [draw] {class Rectangle};
+  \node (circle)  at (2,0)  [draw] {class Circle};
+  \node (ellipse) at (6,0)  [draw] {class Ellipse};
 
   \draw (node cs:name=circle,anchor=north) |- (0,1);
   \draw (node cs:name=ellipse,anchor=north) |- (0,1);