diff --git a/lisp/calc/README b/lisp/calc/README
index fbbd73b8fee..2ddd8645227 100644
--- a/lisp/calc/README
+++ b/lisp/calc/README
@@ -72,6 +72,8 @@ opinions.
 Summary of changes to "Calc"
 ------- -- ------- --  ----
 
+* Added support for Yacas, Maxima and Giac languages.
+
 * Added a menu.
 
 * Added logistic non-linear curves to curve-fitting.