diff --git a/pmb/install/format.py b/pmb/install/format.py
index 9f69a278..45cdf555 100644
--- a/pmb/install/format.py
+++ b/pmb/install/format.py
@@ -8,6 +8,9 @@ import pmb.chroot
 def format_and_mount_boot(args, boot_label):
     """
     :param boot_label: label of the root partition (e.g. "pmOS_boot")
+
+    When adjusting this function, make sure to also adjust
+    ondev-prepare-internal-storage.sh in postmarketos-ondev.git!
     """
     mountpoint = "/mnt/install/boot"
     device = "/dev/installp1"
diff --git a/pmb/install/partition.py b/pmb/install/partition.py
index 35353a30..2498e6cf 100644
--- a/pmb/install/partition.py
+++ b/pmb/install/partition.py
@@ -50,6 +50,9 @@ def partition(args, size_boot, size_reserve):
     * /dev/installp2: root (or reserved space)
     * /dev/installp3: (root, if reserved space > 0)
 
+    When adjusting this function, make sure to also adjust
+    ondev-prepare-internal-storage.sh in postmarketos-ondev.git!
+
     :param size_boot: size of the boot partition in MiB
     :param size_reserve: empty partition between root and boot in MiB (pma#463)
     """