diff --git a/boxes/build-debian-box.sh b/boxes/build-debian-box.sh
index d1f7c25..d020891 100755
--- a/boxes/build-debian-box.sh
+++ b/boxes/build-debian-box.sh
@@ -98,7 +98,7 @@ chroot ${ROOTFS} apt-get install sudo -y --force-yes
 chroot ${ROOTFS} adduser vagrant sudo
 
 # Enable passwordless sudo for users under the "sudo" group
-echo "vagrant ALL=NOPASSWD:ALL" > ${ROOTFS}/etc/sudoers.d/vagrant
+echo "vagrant ALL=(ALL) NOPASSWD:ALL" > ${ROOTFS}/etc/sudoers.d/vagrant
 chmod 0440 ${ROOTFS}/etc/sudoers.d/vagrant
 
 
diff --git a/boxes/build-ubuntu-box.sh b/boxes/build-ubuntu-box.sh
index 73001b9..5ffa27e 100755
--- a/boxes/build-ubuntu-box.sh
+++ b/boxes/build-ubuntu-box.sh
@@ -81,7 +81,7 @@ echo $VAGRANT_KEY > ${ROOTFS}/home/vagrant/.ssh/authorized_keys
 chroot ${ROOTFS} chown -R vagrant: /home/vagrant/.ssh
 
 # Enable passwordless sudo for users under the "sudo" group
-echo "vagrant ALL=NOPASSWD:ALL" > ${ROOTFS}/etc/sudoers.d/vagrant
+echo "vagrant ALL=(ALL) NOPASSWD:ALL" > ${ROOTFS}/etc/sudoers.d/vagrant
 chmod 0440 ${ROOTFS}/etc/sudoers.d/vagrant