diff --git a/chapter05/tcl.xml b/chapter05/tcl.xml
index 592823f46..ba34f063e 100644
--- a/chapter05/tcl.xml
+++ b/chapter05/tcl.xml
@@ -41,7 +41,7 @@ linkend="chapter-building-system"/>.</para>
 <para>Tcl's configure script has a syntax error:</para>
 <screen><userinput>cd unix
 cp configure configure.orig
-sed &quote;s/relid'/relid/&quote; configure.orig &gt; configure</userinput></screen>
+sed "s/relid'/relid/" configure.orig &gt; configure</userinput></screen>
 
 <para>Prepare Tcl for compilation:</para>