diff --git a/nixos-infect b/nixos-infect
index c0f7bc7..8061590 100755
--- a/nixos-infect
+++ b/nixos-infect
@@ -65,7 +65,7 @@ genUserdata() {
   local hashed_password diskDeviceName userdata_infect
   hashed_password="$(mkpasswd -m sha-512 "$USER_PASS")"
   diskDevice="$(determine2ndDisk)"
-  diskDeviceName="${diskDevice##/dev}"
+  diskDeviceName="${diskDevice##/dev/}"
 
   userdata_infect=$(cat << EOF
 {