diff --git a/nix/nixos-module/container/upstream.nix b/nix/nixos-module/container/upstream.nix
index 2add9f7..908883e 100644
--- a/nix/nixos-module/container/upstream.nix
+++ b/nix/nixos-module/container/upstream.nix
@@ -89,7 +89,7 @@ in
       # Do not NAT our public IPv4 addresses
       ${lib.concatMapStringsSep "\n" (net:
         lib.concatMapStrings (subnet: ''
-          ip6tables -t nat -I nixos-nat-post \
+          iptables -t nat -I nixos-nat-post \
             -s ${subnet} \
             -j RETURN
         '') upstreamInterfaces.${net}.upstream.noNat.subnets4 or []