diff --git a/versions/lite/airootfs/fast_install_stage2.sh b/versions/lite/airootfs/fast_install_stage2.sh
index 687e28f..f1cc590 100644
--- a/versions/lite/airootfs/fast_install_stage2.sh
+++ b/versions/lite/airootfs/fast_install_stage2.sh
@@ -69,7 +69,7 @@ yes ${PASSWORD} | passwd
 yes ${PASSWORD} | passwd ${USER}
 
 echo "%sudo ALL=(ALL:ALL) ALL" >> /etc/sudoers
-echo "%wheel ALL=(ALL:ALL) NOPASSWD ALL" >> /etc/sudoers
+echo "%wheel ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers
 
 echo "Installing GRUB"
 
diff --git a/versions/master/airootfs/fast_install_stage2.sh b/versions/master/airootfs/fast_install_stage2.sh
index 56456d5..28deba6 100644
--- a/versions/master/airootfs/fast_install_stage2.sh
+++ b/versions/master/airootfs/fast_install_stage2.sh
@@ -67,7 +67,7 @@ yes ${PASSWORD} | passwd ${USER}
 usermod -a -G wheel slurm
 
 echo "%sudo ALL=(ALL:ALL) ALL" >> /etc/sudoers
-echo "%wheel ALL=(ALL:ALL) NOPASSWD ALL" >> /etc/sudoers
+echo "%wheel ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers
 
 useradd -m -G users,sudo -s /bin/bash maintenance
 ssh-keygen -t ed25519 -C "maintenance" -f /root/.ssh/maintenance -N ''
diff --git a/versions/slave/airootfs/fast_install_stage2.sh b/versions/slave/airootfs/fast_install_stage2.sh
index d96b257..6bdda21 100644
--- a/versions/slave/airootfs/fast_install_stage2.sh
+++ b/versions/slave/airootfs/fast_install_stage2.sh
@@ -67,7 +67,7 @@ yes ${PASSWORD} | passwd ${USER}
 usermod -a -G wheel slurm
 
 echo "%sudo ALL=(ALL:ALL) ALL" >> /etc/sudoers
-echo "%wheel ALL=(ALL:ALL) NOPASSWD ALL" >> /etc/sudoers
+echo "%wheel ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers
 
 useradd -m -G users,sudo -s /bin/bash maintenance