diff --git a/include/android/input.h b/include/android/input.h
index a660761..c7635b8 100644
--- a/include/android/input.h
+++ b/include/android/input.h
@@ -305,6 +305,12 @@
     /* The pointer is not down but has exited the boundaries of a window or view.
      */
     AMOTION_EVENT_ACTION_HOVER_EXIT = 10,
+
+    /* One or more buttons have been pressed. */
+    AMOTION_EVENT_ACTION_BUTTON_PRESS = 11,
+
+    /* One or more buttons have been released. */
+    AMOTION_EVENT_ACTION_BUTTON_RELEASE = 12,
 };
 
 /*
@@ -405,6 +411,8 @@
     AMOTION_EVENT_BUTTON_TERTIARY = 1 << 2,
     AMOTION_EVENT_BUTTON_BACK = 1 << 3,
     AMOTION_EVENT_BUTTON_FORWARD = 1 << 4,
+    AMOTION_EVENT_BUTTON_STYLUS_PRIMARY = 1 << 5,
+    AMOTION_EVENT_BUTTON_STYLUS_SECONDARY = 1 << 6,
 };
 
 /*