diff --git a/XI.h b/XI.h
index 4df6880..328e224 100644
--- a/XI.h
+++ b/XI.h
@@ -152,6 +152,11 @@ SOFTWARE.
 #define XI_CURSORKEYS	"CURSORKEYS"
 #define XI_FOOTMOUSE	"FOOTMOUSE"
 
+/* Properties understood by the server */
+#define XI_PROP_ENABLED      "Device Enabled"
+#define XI_PROP_MODE         "Device Mode"
+
+
 #define Dont_Check			0
 #define XInput_Initial_Release		1
 #define XInput_Add_XDeviceBell		2