diff --git a/README.md b/README.md
index 2db581b..cb84377 100644
--- a/README.md
+++ b/README.md
@@ -179,3 +179,7 @@ Use the `makechrootpkg_noskipinteg.hook` to modify the `makechrootpkg` script to
 not skip integrity checks.
 
 The hook must be placed in `/etc/pacman.d/hooks/`.
+
+Note that the hook only takes effect when `devtools` is updated. If you want to
+activate the hook immediately, you can reinstall `devtools` with
+`pacman -S devtools`.