diff --git a/quantum/quantum_keycodes_legacy.h b/quantum/quantum_keycodes_legacy.h
index e1562077e5f..21aec90675a 100644
--- a/quantum/quantum_keycodes_legacy.h
+++ b/quantum/quantum_keycodes_legacy.h
@@ -55,3 +55,5 @@
 #define KC_ACL1 QK_MOUSE_ACCELERATION_1
 #define KC_MS_ACCEL2 QK_MOUSE_ACCELERATION_2
 #define KC_ACL2 QK_MOUSE_ACCELERATION_2
+
+#define QK_OUTPUT_AUTO OU_AUTO