diff --git a/doc/src/sgml/release-12.sgml b/doc/src/sgml/release-12.sgml
index 27844df3892..76abc95b128 100644
--- a/doc/src/sgml/release-12.sgml
+++ b/doc/src/sgml/release-12.sgml
@@ -835,7 +835,7 @@ Author: Tom Lane <tgl@sss.pgh.pa.us>
 -->
 
        <para>
-        Improve optimization of self-joins (Tom Lane)
+        Improve optimization of self-joins involving columns of type tid (Tom Lane)
        </para>
       </listitem>