diff --git a/docs/install.sh b/docs/install.sh
index 16a291ce..8a911a83 100755
--- a/docs/install.sh
+++ b/docs/install.sh
@@ -79,7 +79,7 @@ if [[ $REPLY =~ ^[Yy]$ ]]; then
 
   # If there is a keyfile for a data disk, put copy it to the root partition and
   # ensure the permissions are set appropriately.
-  if [[ -f "/tmp/swap.key" ]]; then
+  if [[ -f "/mnt-root/etc/swap.key" ]]; then
     sudo cp /mnt-root/etc/swap.key /mnt/etc/swap.key
     sudo chmod 0400 /mnt/etc/swap.key
   fi