diff --git a/nix/configurations/vanadium/nixos/input.nix b/nix/configurations/vanadium/nixos/input.nix
index 761e8095..068207ab 100644
--- a/nix/configurations/vanadium/nixos/input.nix
+++ b/nix/configurations/vanadium/nixos/input.nix
@@ -18,6 +18,9 @@
     enable = true;
     brscan5.enable = true;
   };
+  environment.sessionVariables = {
+    SANE_DEFAULT_DEVICE = "brother5:bus2;dev2";
+  };
 
   services.fprintd.enable = false;