diff --git a/chapter01/whatsnew.xml b/chapter01/whatsnew.xml
index 3c6df1428..e9a69bd04 100644
--- a/chapter01/whatsnew.xml
+++ b/chapter01/whatsnew.xml
@@ -11,6 +11,14 @@
 
   <title>What's new since the last release</title>
 
+  <para>In 11.3 release, <parameter>--enable-default-pie</parameter>
+  and <parameter>--enable-default-ssp</parameter> are enabled for GCC.
+  They can mitigate some type of malicious attacks but they cannot provide
+  a full protection.  In case if you are reading a programming textbook,
+  you may need to disable PIE and SSP with GCC options
+  <parameter>-fno-pie -no-pie -fno-stack-protection</parameter>
+  because some textbooks assume they were disabled by default.</para>
+
   <para>Below is a list of package updates made since the previous
   release of the book.</para>