diff --git a/doc/src/sgml/filelist.sgml b/doc/src/sgml/filelist.sgml
index f010cd4c3bc..48ac14a8380 100644
--- a/doc/src/sgml/filelist.sgml
+++ b/doc/src/sgml/filelist.sgml
@@ -166,6 +166,7 @@
 <!ENTITY sourcerepo SYSTEM "sourcerepo.sgml">
 
 <!ENTITY release    SYSTEM "release.sgml">
+<!ENTITY release-12     SYSTEM "release-12.sgml">
 <!ENTITY release-11     SYSTEM "release-11.sgml">
 <!ENTITY release-10     SYSTEM "release-10.sgml">
 <!ENTITY release-9.6    SYSTEM "release-9.6.sgml">
diff --git a/doc/src/sgml/release-12.sgml b/doc/src/sgml/release-12.sgml
new file mode 100644
index 00000000000..b06fef287dc
--- /dev/null
+++ b/doc/src/sgml/release-12.sgml
@@ -0,0 +1,11 @@
+<!-- doc/src/sgml/release-12.sgml -->
+<!-- See header comment in release.sgml about typical markup -->
+
+ <sect1 id="release-12">
+  <title>Release 12</title>
+
+  <para>JIT is enabled by default in this release.  It was disabled by
+  default in PG 11, so we document is enablement here.
+  </para>
+
+ </sect1>
diff --git a/doc/src/sgml/release.sgml b/doc/src/sgml/release.sgml
index b78a942bcd1..c4e763a0432 100644
--- a/doc/src/sgml/release.sgml
+++ b/doc/src/sgml/release.sgml
@@ -76,6 +76,7 @@ For new features, add links to the documentation sections.
   The reason for splitting the release notes this way is so that appropriate
   subsets can easily be copied into back branches.
 -->
+&release-12;
 &release-11;
 &release-10;
 &release-9.6;