diff --git a/profiles b/profiles
index fe4c81e..b3e3e55 100644
--- a/profiles
+++ b/profiles
@@ -18,6 +18,7 @@ declare -Ag r4s=(
     kmod-fs-btrfs btrfs-progs block-mount smcroute avahi-daemon \
     curl ethtool ca-bundle"
   [config]="CONFIG_KERNEL_BTRFS_FS_POSIX_ACL=y CONFIG_BTRFS_PROGS_ZSTD=y \
+    CONFIG_TARGET_ROOTFS_PARTSIZE=512 CONFIG_TARGET_KERNEL_PARTSIZE=32 \
     CONFIG_BUILDBOT=n"
   [files]="/mnt/backup"
 )