diff --git a/doc/src/sgml/release-9.5.sgml b/doc/src/sgml/release-9.5.sgml
index 64057c3..5c86222 100644
--- a/doc/src/sgml/release-9.5.sgml
+++ b/doc/src/sgml/release-9.5.sgml
@@ -108,7 +108,9 @@
       an integer variable will now assign 4 rather than failing.  If no
       assignment-grade cast is defined for the particular source and
       destination types, <application>PL/pgSQL</> will fall back to its old
-      I/O conversion behavior.
+      I/O conversion behavior. This change also may bring different results of
+      type casts between floating point numbers having different conversion
+      errors.
      </para>
     </listitem>