diff --git a/target/bootdisk/shutdown b/target/bootdisk/shutdown
index 6f7425b02..8cf0b0b9c 100644
--- a/target/bootdisk/shutdown
+++ b/target/bootdisk/shutdown
@@ -14,7 +14,7 @@ swapoff -a || error=$?
 sync ; sleep 1
 
 echo "Unmounting filesystems."
-umount -avf
+umount -avf || error=$?
 
 echo "Reboot ..."
 reboot -f