diff --git a/hosts/sin/copyparty.nix b/hosts/sin/copyparty.nix
index 35acb56..5faee7b 100644
--- a/hosts/sin/copyparty.nix
+++ b/hosts/sin/copyparty.nix
@@ -13,6 +13,7 @@
       z = true;
       qr = true;
       xff-hdr = "X-Real-IP";
+      xff-src = "lan";
       rproxy = 1;
       http-only = true;
       og = true;