diff --git a/disko/hetzner.nix b/disko/hetzner.nix
index cc4e60b..7758259 100644
--- a/disko/hetzner.nix
+++ b/disko/hetzner.nix
@@ -24,7 +24,7 @@
               priority = 1;
             };
             root = {
-              size = "-1G";
+              end = "-1G";
               content = {
                 type = "filesystem";
                 format = "ext4";