diff --git a/chapter06/bzip2-exp.xml b/chapter06/bzip2-exp.xml
index 10e4129e4..99eded1d5 100644
--- a/chapter06/bzip2-exp.xml
+++ b/chapter06/bzip2-exp.xml
@@ -8,5 +8,12 @@ Makefile-libbz2_so file which creates a dynamic libbz2.so library and
 links the bzip2 utilities against it.
 </para>
 
+<para>
+The reason we don't use <userinput>make install</userinput> is that
+bzip2's make install doesn't install the shared libbz2.so, nor the bzip2
+binary that's linked against that library. So we have no choice but to
+manually install the files.
+</para>
+
 </sect2>