diff --git a/proxmox-zfs-postinstall.sh b/proxmox-zfs-postinstall.sh
index df830f7..27185cc 100644
--- a/proxmox-zfs-postinstall.sh
+++ b/proxmox-zfs-postinstall.sh
@@ -215,7 +215,7 @@ echo $ZFS_ARC_MAX_BYTES > /sys/module/zfs/parameters/zfs_arc_max
 
 cat << EOF > /etc/modprobe.d/zfs.conf
 options zfs zfs_arc_min=$ZFS_ARC_MIN_BYTES
-options zfs zfs_arc_min=$ZFS_ARC_MAX_BYTES
+options zfs zfs_arc_max=$ZFS_ARC_MAX_BYTES
 EOF
 
 if [[ "$install_checkmk" == "y" ]]; then
@@ -287,4 +287,4 @@ fi
 echo "Updating initramfs - This will take some time..."
 update-initramfs -u -k all > /dev/null 2>&1
 
-echo "Proxmox postinstallation finished!"
\ No newline at end of file
+echo "Proxmox postinstallation finished!"