--- a/base-target-features.lisp-expr
+++ b/base-target-features.lisp-expr
@@ -353,6 +353,9 @@
  ;; (Replaces use of SIGALRM.)
  ; :sb-wtimer
 
+ ;; This platform implements VOPs for %ash/right, variable-width shift right
+ ; :ash-right-vops
+
  ;;
  ;; miscellaneous notes on other things which could have special significance
  ;; in the *FEATURES* list