diff --git a/ops/nixos/swann/default.nix b/ops/nixos/swann/default.nix
index 138d78dac2..0b6454835f 100644
--- a/ops/nixos/swann/default.nix
+++ b/ops/nixos/swann/default.nix
@@ -157,6 +157,16 @@ in {
         '';
       addRules = map ruleToLine rules;
     in ''
+      # Fix Tailscale, by adding routing rules just before the one they add at prio 5200.
+      ip -4 rule del priority 5196 || true
+      ip -4 rule del priority 5197 || true
+      ip -4 rule del priority 5198 || true
+      ip -4 rule del priority 5199 || true
+      ip -4 rule add from all fwmark 0x80000 lookup 150 priority 5196
+      ip -4 rule add from all fwmark 0x80000 lookup 151 priority 5197
+      ip -4 rule add from all fwmark 0x80000 lookup 152 priority 5198
+      ip -4 rule add from all fwmark 0x80000 lookup 153 priority 5199
+
       ${lib.concatStringsSep "\n" clearRules}
       ${lib.concatStringsSep "\n" addRules}