diff --git a/ZFS-Feature-Support-&-Wishlist.md b/ZFS-Feature-Support-&-Wishlist.md
index 5cefebb..4b0d321 100644
--- a/ZFS-Feature-Support-&-Wishlist.md
+++ b/ZFS-Feature-Support-&-Wishlist.md
@@ -26,3 +26,8 @@ Syntax:
     * then use `zfs allow -d` to limit zrepl daemon to just destroy those snaps it created
 
 
+## `zfs allow -u zrepl set_user_prop=zrepl:placeholder zroot`
+
+* required to have placeholders working with unprivileged zrepl
+* not relevant if your mapping does not produce placeholders
+