diff --git a/preseed/debian/jessie/preseed.cfg b/preseed/debian/jessie/preseed.cfg
index 1bc1331..25f08a9 100644
--- a/preseed/debian/jessie/preseed.cfg
+++ b/preseed/debian/jessie/preseed.cfg
@@ -342,12 +342,16 @@ d-i   popularity-contest/participate              boolean     true
 
 # This is fairly safe to set, it makes grub install automatically to the MBR
 # if no other operating system is detected on the machine.
-d-i   grub-installer/only_debian                  boolean true
+d-i   grub-installer/only_debian                  boolean     true
 
 # This one makes grub-installer install to the MBR if it also finds some other
 # OS, which is less safe as it might not be able to boot that other OS.
-d-i   grub-installer/with_other_os                boolean true
+d-i   grub-installer/with_other_os                boolean     true
 
+# Since Debian Jessie, the d-i will ask to specify the device for Grub.
+# Should use 'default', to use the default system disk
+#   Fix: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=759737
+d-i   grub-installer/bootdev                      string      default
 
 
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