diff --git a/lisp/allout-widgets.el b/lisp/allout-widgets.el
index e7750b3606e..64f2ba500d9 100644
--- a/lisp/allout-widgets.el
+++ b/lisp/allout-widgets.el
@@ -988,6 +988,7 @@ Generally invoked via `allout-exposure-change-functions'."
         ;; have to distinguish between concealing and exposing so that, eg,
         ;; `allout-expose-topic's mix is handled properly.
         handled-expose
+        handled-conceal
         covered
         deactivate-mark)