diff --git a/CHANGES b/CHANGES
index e3e088910d1..10e990eba52 100644
--- a/CHANGES
+++ b/CHANGES
@@ -23,6 +23,8 @@ Incompatible changes
 * Due to the scoping changes for :rst:dir:`productionlist` some uses of
   :rst:role:`token` must be modified to include the scope which was previously
   ignored.
+* #6903: std domain: Internal data structure has changed. Now objects have
+  for cross reference
 
 Deprecated
 ----------