diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index 4649ee35b605..2fb6fae50e90 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h
@@ -194,6 +194,8 @@ struct input_keymap_entry {
 #define SYN_CONFIG		1
 #define SYN_MT_REPORT		2
 #define SYN_DROPPED		3
+#define SYN_MAX			0xf
+#define SYN_CNT			(SYN_MAX+1)
 
 /*
  * Keys and buttons