diff --git a/mingw-w64-headers/include/mscat.h b/mingw-w64-headers/include/mscat.h
index 22ff20a..05d8e12 100644
--- a/mingw-w64-headers/include/mscat.h
+++ b/mingw-w64-headers/include/mscat.h
@@ -54,6 +54,9 @@
 #define CRYPTCAT_E_CDF_ATTR_TOOFEWVALUES    0x00020002
 #define CRYPTCAT_E_CDF_ATTR_TYPECOMBO       0x00020004
 
+#define CRYPTCAT_VERSION_1  0x100
+#define CRYPTCAT_VERSION_2  0x200
+
 #include <pshpack8.h>
 
 typedef struct CRYPTCATATTRIBUTE_