diff --git a/relnotes/next b/relnotes/next
--- a/relnotes/next
+++ b/relnotes/next
@@ -24,6 +24,11 @@
 used to have some space-padding, and truncation to fit within 72 columns. Both
 the padding and the truncation has been removed.
 
+Some of the text in labels passed to merge tools has changed. For example,
+in conflicts while running `hg histedit`, the labels used to be "local",
+"base", and "histedit". They are now "already edited",
+"parent of current change", and "current change", respectively.
+
 == Internal API Changes ==
 
 The following functions have been removed: