diff --git a/image_to_vm.sh b/image_to_vm.sh
index ae3aaab72f..695111f52c 100755
--- a/image_to_vm.sh
+++ b/image_to_vm.sh
@@ -150,8 +150,8 @@ dd if="${SRC_IMAGE}" of="${TEMP_PMBR}" bs=512 count=1
 TEMP_MNT=$(mktemp -d)
 TEMP_ESP_MNT=$(mktemp -d)
 cleanup() {
-  sudo umount -d "${TEMP_MNT}"
-  sudo umount -d "${TEMP_ESP_MNT}"
+  sudo umount "${TEMP_MNT}"
+  sudo umount "${TEMP_ESP_MNT}"
   rmdir "${TEMP_MNT}" "${TEMP_ESP_MNT}"
 }
 trap cleanup INT TERM EXIT
diff --git a/mod_image_for_recovery.sh b/mod_image_for_recovery.sh
index fae75e281f..e48b0ae5c7 100755
--- a/mod_image_for_recovery.sh
+++ b/mod_image_for_recovery.sh
@@ -77,7 +77,7 @@ get_install_vblock() {
   sudo cp "$stateful_mnt/vmlinuz_hd.vblock"  "$out"
   sudo chown $USER "$out"
 
-  sudo umount -d "$stateful_mnt"
+  sudo umount "$stateful_mnt"
   rmdir "$stateful_mnt"
   set -e
   echo "$out"
@@ -243,7 +243,7 @@ install_recovery_kernel() {
     local esp_mnt=$(mktemp -d)
     sudo mount -o loop,offset=$((esp_offset * 512)) "$RECOVERY_IMAGE" "$esp_mnt"
     sudo cp "$vmlinuz" "$esp_mnt/syslinux/vmlinuz.A" || failed=1
-    sudo umount -d "$esp_mnt"
+    sudo umount "$esp_mnt"
     rmdir "$esp_mnt"
     set -e
   fi
@@ -323,7 +323,7 @@ maybe_resize_stateful() {
   sudo mount -o loop $small_stateful $new_stateful_mnt
   sudo cp "$INSTALL_VBLOCK" "$new_stateful_mnt/vmlinuz_hd.vblock"
   sudo mkdir "$new_stateful_mnt/var"
-  sudo umount -d "$new_stateful_mnt"
+  sudo umount "$new_stateful_mnt"
   rmdir "$new_stateful_mnt"
   set -e
 
diff --git a/mount_gpt_image.sh b/mount_gpt_image.sh
index 7c9a8d9c8b..ae6aa4032b 100755
--- a/mount_gpt_image.sh
+++ b/mount_gpt_image.sh
@@ -86,10 +86,10 @@ function unmount_image() {
   sudo umount "${FLAGS_rootfs_mountpt}/usr/local"
   sudo umount "${FLAGS_rootfs_mountpt}/var"
   if [[ -n "${FLAGS_esp_mountpt}" ]]; then
-    sudo umount -d "${FLAGS_esp_mountpt}"
+    sudo umount "${FLAGS_esp_mountpt}"
   fi
-  sudo umount -d "${FLAGS_stateful_mountpt}"
-  sudo umount -d "${FLAGS_rootfs_mountpt}"
+  sudo umount "${FLAGS_stateful_mountpt}"
+  sudo umount "${FLAGS_rootfs_mountpt}"
   set -e
 }