diff --git a/modules/capabilities/niri/default.nix b/modules/capabilities/niri/default.nix
index d98a7e4..3adb144 100644
--- a/modules/capabilities/niri/default.nix
+++ b/modules/capabilities/niri/default.nix
@@ -147,7 +147,7 @@ in
 
         input = {
           focus-follows-mouse.enable = true;
-          mouse."accel-speed" = 0.4;
+          mouse."accel-speed" = if machine.portable then -0.4 else 0.4;
           keyboard = {
             repeat-delay = 300;
             repeat-rate = 50;