diff --git a/chapter01/whatsnew.xml b/chapter01/whatsnew.xml
index 78a241373..03647e34c 100644
--- a/chapter01/whatsnew.xml
+++ b/chapter01/whatsnew.xml
@@ -25,7 +25,7 @@
     </para>
   </caution>
 
-  <para>In the 11.4 release, <parameter>--disable-fixincludes</parameter>
+  <para>In the 12.0 release, <parameter>--disable-fixincludes</parameter>
   is set for GCC.  It's a configure switch newly added in GCC 13.1 to
   prevent GCC from <quote>fixing</quote> the system headers.  Such a
   <quote>fix</quote> is unnecessary for a modern Linux system and may cause