diff --git a/install_scripts/neptune.sh b/install_scripts/neptune.sh
index bc4369a..8c424f9 100755
--- a/install_scripts/neptune.sh
+++ b/install_scripts/neptune.sh
@@ -33,8 +33,8 @@ EOF
 sleep 1
 
 while : ; do
-    cryptsetup --batch-mode luksFormat --iter-time 1000 ${DEVICE}3
-    cryptsetup --batch-mode open --tries 1 ${DEVICE}3 cryptpart && break
+    cryptsetup --batch-mode luksFormat --iter-time 1000 ${DEVICE}p3
+    cryptsetup --batch-mode open --tries 1 ${DEVICE}p3 cryptpart && break
 done
 
 pvcreate /dev/mapper/cryptpart