diff --git a/config/zaphod_lite.keymap b/config/zaphod_lite.keymap
index 4268ed0..24002c3 100644
--- a/config/zaphod_lite.keymap
+++ b/config/zaphod_lite.keymap
@@ -83,6 +83,12 @@ combos {
     key-positions = <LT0 LB0 RT0 RB0>;
     bindings = <&bootloader>;
   };
+  // Top right hand inner two keys for alt-tab tri-state.
+  combo_alt_tab {
+    timeout-ms = <50>;
+    key-positions = <RT0 RT1>;
+    bindings = <&alt_tab>;
+  };
 };
 
 behaviors {
@@ -148,6 +154,7 @@ behaviors {
     compatible = "zmk,behavior-tri-state";
     #binding-cells = <0>;
     bindings = <&kt LALT>, <&kp TAB>, <&kt LALT>;
+    ignored-key-positions = <RT0 RT1>;
   };
 };