diff --git a/XI.h b/XI.h
index ef68094..1701828 100644
--- a/XI.h
+++ b/XI.h
@@ -110,14 +110,12 @@ SOFTWARE.
 #define sz_xGetDeviceControlReply		32
 #define sz_xChangeDeviceControlReq		8
 #define sz_xChangeDeviceControlReply		32
-#define sz_xQueryDevicePointerReq               12 
+#define sz_xQueryDevicePointerReq               12
 #define sz_xQueryDevicePointerReply             32
 #define sz_xWarpDevicePointerReq                28
 #define sz_xChangeDeviceCursorReq               16
 #define sz_xChangeDeviceHierarchyReq            8
-#define sz_xRegisterPairingClientReq            8
-#define sz_xRegisterPairingClientReply          32 
-#define sz_xChangeWindowAccessReq               12 
+#define sz_xChangeWindowAccessReq               12
 #define sz_xQueryWindowAccessReq                8
 #define sz_xQueryWindowAccessReply              32
 #define sz_xSetClientPointerReq                 12