diff --git a/chapter05/fileutils-inst.xml b/chapter05/fileutils-inst.xml
index d1e09cad5..b9bd7aa3a 100644
--- a/chapter05/fileutils-inst.xml
+++ b/chapter05/fileutils-inst.xml
@@ -7,7 +7,7 @@ limited to, Linux systems that run Glibc-2.2.3 with an AMD CPU (Athlons
 and Durons are the most reported used CPU's). If you are in this category, 
 run the following to sed commands before you compile this package.
 
-<screen><userinput>cp lib/Makefile.in lib/Makefile.in.backup &amp;&amp;</userinput>
+<screen><userinput>cp -f lib/Makefile.in lib/Makefile.in.backup &amp;&amp;</userinput>
 <userinput>sed 's/\(.*\)\(fopen-safer\.c \)\\/\1\2atexit.c \\/' \</userinput>
 <userinput>&nbsp;&nbsp;&nbsp;lib/Makefile.in &gt; tmp &amp;&amp;</userinput>
 <userinput>sed 's/\(.*\)\(idcache\$U\.\$.*\)\\/\1\2atexit$U.$(OBJEXT) \\/' \</userinput>