diff --git a/debian9-x86_64.sh b/debian9-x86_64.sh
index d76c87e..1a12d74 100644
--- a/debian9-x86_64.sh
+++ b/debian9-x86_64.sh
@@ -207,8 +207,10 @@ if [ "$LOCALFILES" = "no" ]; then
 else
 	cd ${DIR}
 fi
+rm -f /etc/grub.d/30_os-prober
 bash update-grub.sh ${KERNEL_VERSION}-mptcp
 bash update-grub.sh ${KERNEL_RELEASE}
+sed -i 's/default="1>0"/default="0"/' /boot/grub/grub.cfg 2>&1 >/dev/null
 
 echo "Install tracebox OpenMPTCProuter edition"
 apt-get -y -o Dpkg::Options::="--force-overwrite" install tracebox