diff --git a/packer/rootfs/etc/wireguard/wg0.conf b/packer/rootfs/etc/wireguard/wg0.conf
index 1856e7b..aa737d0 100644
--- a/packer/rootfs/etc/wireguard/wg0.conf
+++ b/packer/rootfs/etc/wireguard/wg0.conf
@@ -9,9 +9,9 @@ PostUp = wg set '%i' private-key '/etc/wireguard/%i-privatekey'
 PostUp = [ -e '/etc/wireguard/%i-peers.conf' ] || (umask 022 && touch '/etc/wireguard/%i-peers.conf')
 PostUp = wg addconf '%i' '/etc/wireguard/%i-peers.conf'
 # Enable IPv4/IPv6 forwarding
-PostUp = grep -Fxq '1' /proc/sys/net/ipv4/ip_forward              || printf 1 > /proc/sys/net/ipv4/ip_forward
-PostUp = grep -Fxq '1' /proc/sys/net/ipv6/conf/all/forwarding     || printf 1 > /proc/sys/net/ipv6/conf/all/forwarding
-PostUp = grep -Fxq '1' /proc/sys/net/ipv6/conf/default/forwarding || printf 1 > /proc/sys/net/ipv6/conf/default/forwarding
+PostUp = grep -Fxq 1 /proc/sys/net/ipv4/ip_forward              || printf 1 > /proc/sys/net/ipv4/ip_forward
+PostUp = grep -Fxq 1 /proc/sys/net/ipv6/conf/all/forwarding     || printf 1 > /proc/sys/net/ipv6/conf/all/forwarding
+PostUp = grep -Fxq 1 /proc/sys/net/ipv6/conf/default/forwarding || printf 1 > /proc/sys/net/ipv6/conf/default/forwarding
 # Store the internet-facing interface in a file for later use
 PostUp = ip route show default | awk '/^default/{print $5}' > '/etc/wireguard/%i-iface'
 # Allow access WireGuard via port 51820/UDP on the internet-facing interface