diff --git a/general-info/release-19a.txt b/general-info/release-19a.txt
index 0c03fbf22a7cf88f8374d9b93fb7a5b17294e18d..7a651dbb7943617ece7a4af16f8f95945a8eef34 100644
--- a/general-info/release-19a.txt
+++ b/general-info/release-19a.txt
@@ -271,6 +271,10 @@ New in this release:
        that the method is used.
      - Redefining a generic function with a different method
        combination now recomputes effective methods.
+     - Slot access and gf-call optimizations are no longer performed
+       for method parameters being assigned to in a method body, because
+       we can't tell what type of object the method parameter actually
+       contains.
 
   * Improvements to Hemlock, the Emacs-like editor: