diff --git a/hosts/Emitter.nix b/hosts/Emitter.nix
index 6ec357e..f0e9c2a 100644
--- a/hosts/Emitter.nix
+++ b/hosts/Emitter.nix
@@ -102,7 +102,7 @@
                     ${pkgs.dig}/bin/nslookup rupert.gvfr.de
                     ${pkgs.unixtools.ping}/bin/ping -c1 rupert.gvfr.de >/dev/null
                     echo "Opening SSH tunnel."
-                    ${pkgs.openssh}/bin/ssh -i /secrets/id_burp_remote -o IdentitiesOnly=yes -o ExitOnForwardFailure=yes -L 4971:localhost:4971 burp-remote@rupert.gvfr.de -f true
+                    ${pkgs.openssh}/bin/ssh -6 -i /secrets/id_burp_remote -o IdentitiesOnly=yes -o ExitOnForwardFailure=yes -L 4971:localhost:4971 burp-remote@rupert.gvfr.de -f true
                     echo "Beginning backup operation."
                     $out/sbin/burp-untunneled \$@
                     EOF