diff --git a/local/upgrade.txt b/local/upgrade.txt
index 2815621077b94..152f12852806a 100644
--- a/local/upgrade.txt
+++ b/local/upgrade.txt
@@ -1,5 +1,10 @@
 This file describes API changes for the plugins of the type 'local'.
 
+=== 3.1 ===
+
+* Navigation API callbacks local_<plugin>_extends_navigation() and local_<plugin>_extends_settings_navigation() have been removed.
+  Please rename them to local_<plugin>_extend_navigation() and local_<plugin>_extend_settings_navigation() respectively.
+
 === 2.9 ===
 
 * Navigation API callbacks local_<plugin>_extends_navigation() and local_<plugin>_extends_settings_navigation() are deprecated.