diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index cad1d9819..0ef3cdc1b 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -577,7 +577,7 @@ or a pool of lava or a wall of lava.
 An opulent throne.
 \item[\tb{a-z}]
 \item[\tb{A-Z}]
-\item[\tb{@\&\-:;}]
+\item[\tb{@\&\verb+'+:;}]
 Letters and certain other symbols represent the various inhabitants
 of the Mazes of Menace.
 Watch out, they can be nasty and vicious.