diff --git a/right-fit-swap-for-laptop-hibernation-Ubuntu-20.04-full-ZFS-install.md b/right-fit-swap-for-laptop-hibernation-Ubuntu-20.04-full-ZFS-install.md
index 5fad6c1..9f14040 100644
--- a/right-fit-swap-for-laptop-hibernation-Ubuntu-20.04-full-ZFS-install.md
+++ b/right-fit-swap-for-laptop-hibernation-Ubuntu-20.04-full-ZFS-install.md
@@ -101,6 +101,12 @@ HandleSuspendKey=suspend-then-hibernate
 HandleLidSwitch=suspend-then-hibernate
 ~~~
 
+Now ajust /etc/fstab to use your mapper, replace your swap UUID device to :
+
+~~~
+/dev/mapper/swapDevice   none   swap   discard   0   0
+~~~
+
 ## encrypt swap partition
 
 ~~~