diff --git a/chapter03/introduction.xml b/chapter03/introduction.xml
index 1a69187a2..0e90508ae 100644
--- a/chapter03/introduction.xml
+++ b/chapter03/introduction.xml
@@ -104,4 +104,14 @@ popd</userinput></screen>
   <para>This check can be used after retrieving the needed files with any of the
   methods listed above.</para>
 
+  <para>If the packages and patches are downloaded as a non-&root; user,
+  these files will be owned by the user.  The file system records the
+  owner by its UID, and the UID of a normal user in the host distro is
+  not assigned in LFS.  So the files will be left owned by an unnamed UID
+  in the final LFS system.  If you won't assign the same UID for your user
+  in the LFS system, change the owners of these files to &root; now to
+  avoid this issue:</para>
+
+<screen role="nodump"><userinput>chown root:root $LFS/sources/*</userinput></screen>
+
 </sect1>