diff --git a/include/input/InputDevice.h b/include/input/InputDevice.h
index b6efc82..20a17e3 100644
--- a/include/input/InputDevice.h
+++ b/include/input/InputDevice.h
@@ -180,6 +180,8 @@
     VIRTUAL_KEYBOARD_ID = -1,
     // Device id of the "built-in" keyboard if there is one.
     BUILT_IN_KEYBOARD_ID = 0,
+    // First device id available for dynamic devices
+    END_RESERVED_ID = 1,
 };
 
 } // namespace android