diff --git a/notes.md b/notes.md
index 6654214..c64b771 100644
--- a/notes.md
+++ b/notes.md
@@ -27,6 +27,7 @@ Format partitions:
 
     $ sudo mkfs.fat -F32 -nESP /dev/nvme0n1p1
     mkfs.fat 4.1 (2017-01-24)
+    $ sudo mkswap /dev/nvme0n1p4
     $ sudo mkfs.ext4 -L boot /dev/nvme0n1p2
     […]
     $ sudo cryptsetup luksFormat /dev/nvme0n1p3