diff --git a/CHANGES/1357.misc.rst b/CHANGES/1357.misc.rst
index 0f268f7a..96822c1f 100644
--- a/CHANGES/1357.misc.rst
+++ b/CHANGES/1357.misc.rst
@@ -1 +1 @@
-new improved CallableMixin
+Speeded up CallableMixin processing by caching references to nested objects and simplifying kwargs assembly.