diff --git a/chapter08/gmp.xml b/chapter08/gmp.xml
index 0820f726c..d9c761834 100644
--- a/chapter08/gmp.xml
+++ b/chapter08/gmp.xml
@@ -41,15 +41,6 @@
   <sect2 role="installation">
     <title>Installation of GMP</title>
 
-    <note>
-      <para>If you are building for 32-bit x86, but you have a CPU which is
-      capable of running 64-bit code <emphasis>and</emphasis> you have specified
-      <envar>CFLAGS</envar> in the environment, the configure script will
-      attempt to configure for 64-bits and fail.
-      Avoid this by invoking the configure command below with
-<screen role="nodump"><userinput><parameter>ABI=32</parameter> ./configure ...</userinput></screen></para>
-    </note>
-
     <note>
       <para>The default settings of GMP produce libraries optimized for
       the host processor.  If libraries suitable for processors less
@@ -106,7 +97,7 @@ make html</userinput></screen>
     the system capabilities and there will be errors in the tests or other
     applications using the gmp libraries with the message "Illegal
     instruction".  In this case, gmp should be reconfigured with the option
-    --build=x86_64-pc-linux-gnu and rebuilt.</para></caution>
+    --build=aarch64-unknown-linux-gnu and rebuilt.</para></caution>
 
     <para>Ensure that all 197 tests in the test suite passed.
     Check the results by issuing the following command:</para>