diff --git a/systems/pbp.nix b/systems/pbp.nix
index a2b1def..743a759 100644
--- a/systems/pbp.nix
+++ b/systems/pbp.nix
@@ -14,7 +14,7 @@
   grub = {
      enable = true;
      efiSupport = true;
-     device = "/dev/mmcblk0";
+     device = "/dev/mmcblk0p1";
     };
   };