diff --git a/include/linux/input.h b/include/linux/input.h
index d4cdb02..3448daf 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -803,6 +803,9 @@
 
 #define ABS_MISC		0x28
 
+#define ABS_MT_POSITION		0x2a
+#define ABS_MT_AMPLITUDE	0x2b
+
 #define ABS_MT_SLOT		0x2f	/* MT slot being modified */
 #define ABS_MT_TOUCH_MAJOR	0x30	/* Major axis of touching ellipse */
 #define ABS_MT_TOUCH_MINOR	0x31	/* Minor axis (omit if circular) */