diff --git a/README.md b/README.md
index b84b0ed..a53c9e8 100644
--- a/README.md
+++ b/README.md
@@ -128,6 +128,7 @@ $ sudo yum install nohang
 $ sudo systemctl enable nohang.service
 $ sudo systemctl start nohang.service
 ```
+PSI support may be enabled on RHEL 8 by passind `psi=1` to kernel boot cmdline.
 
 #### For Arch Linux there's an [AUR package](https://aur.archlinux.org/packages/nohang-git/)