diff --git a/chapter06/file-inst.xml b/chapter06/file-inst.xml
index 7281dcb5a..9602cfd04 100644
--- a/chapter06/file-inst.xml
+++ b/chapter06/file-inst.xml
@@ -1,7 +1,10 @@
 <sect2>
 <title>Installation of File</title>
 
-<para>Install File by running the following commands:</para>
+<para>Note that the sed used in this installation only works if the line
+break is placed exactly where it is in the book.  Don't try and put it
+all on one line otherwise it won't work.  Install File by running the 
+following commands:</para>
 
 <para><screen><userinput>cp -f readelf.h readelf.h.backup &amp;&amp;</userinput>
 <userinput>sed '/#define __/a \</userinput>