include/wingdi.h: Define R2_LAST.
diff --git a/include/wingdi.h b/include/wingdi.h
index 14c307d..322a267 100644
--- a/include/wingdi.h
+++ b/include/wingdi.h
@@ -392,6 +392,7 @@
 #define R2_MERGEPENNOT  14
 #define R2_MERGEPEN     15
 #define R2_WHITE        16
+#define R2_LAST         16
 
 #define MAKEROP4(fore,back) (DWORD)((((back)<<8)&0xFF000000)|(fore))