diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index a55c8632b..0702c5466 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -24,6 +24,11 @@
 
 <itemizedlist>
 
+<listitem><para>January 30th, 2002 [markh]: Chapters 5+6: Added
+CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE" to the configure command for patch.
+This fixes compilation on PPC and m68k platforms and doesn't hurt on
+x86.</para></listitem>
+
 <listitem><para>January 30th, 2002 [gerard]: Chapter 5 - Mounting proc:
 Rephrased the text a bit (it implied you can only mount the proc fs more
 than once, which isn't true anymore these days).</para></listitem>
diff --git a/chapter05/patch-exp.xml b/chapter05/patch-exp.xml
new file mode 100644
index 000000000..82a5489e8
--- /dev/null
+++ b/chapter05/patch-exp.xml
@@ -0,0 +1,11 @@
+<sect2>
+<title>Command explanations</title>
+
+<para><userinput>CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE": </userinput>
+Adding <userinput>-D_GNU_SOURCE</userinput> command before
+we configure patch fixes installation of the package on PPC and m68k
+platforms (that we know of).  It also doesn't hurt compilation on other
+platforms (such as x86) so we do it by default.</para>
+
+</sect2>
+
diff --git a/chapter05/patch-inst.xml b/chapter05/patch-inst.xml
index 4eebac903..6a1d5d5cb 100644
--- a/chapter05/patch-inst.xml
+++ b/chapter05/patch-inst.xml
@@ -3,7 +3,7 @@
 
 <para>Install Patch by running the following commands:</para>
 
-<para><screen><userinput>./configure --prefix=$LFS/usr &amp;&amp;
+<para><screen><userinput>CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE" ./configure --prefix=$LFS/usr &amp;&amp;
 make LDFLAGS=-static &amp;&amp;
 make install</userinput></screen></para>
 
diff --git a/chapter05/patch.xml b/chapter05/patch.xml
index ab2dd1074..f0a5007fe 100644
--- a/chapter05/patch.xml
+++ b/chapter05/patch.xml
@@ -6,6 +6,7 @@
 Estimated required disk space:  &patch-compsize-static;</screen>
 
 &c5-patch-inst;
+&c5-patch-exp;
 &aa-patch-desc;
 &aa-patch-dep;
 
diff --git a/chapter06/patch-inst.xml b/chapter06/patch-inst.xml
index c985d8682..52c9e7b5d 100644
--- a/chapter06/patch-inst.xml
+++ b/chapter06/patch-inst.xml
@@ -3,7 +3,7 @@
 
 <para>Install Patch by running the following commands:</para>
 
-<para><screen><userinput>./configure --prefix=/usr &amp;&amp;
+<para><screen><userinput>CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE" ./configure --prefix=/usr &amp;&amp;
 make &amp;&amp;
 make install</userinput></screen></para>
 
diff --git a/index.xml b/index.xml
index c9e50c312..e83095f20 100644
--- a/index.xml
+++ b/index.xml
@@ -177,6 +177,7 @@
 <!ENTITY c5-mawk-inst SYSTEM "chapter5/mawk-inst.xml">
 <!ENTITY c5-patch SYSTEM "chapter5/patch.xml">
 <!ENTITY c5-patch-inst SYSTEM "chapter5/patch-inst.xml">
+<!ENTITY c5-patch-exp SYSTEM "chapter5/patch-exp.xml">
 <!ENTITY c5-sed SYSTEM "chapter5/sed.xml">
 <!ENTITY c5-sed-inst SYSTEM "chapter5/sed-inst.xml">
 <!ENTITY c5-shellutils SYSTEM "chapter5/shellutils.xml">