diff --git a/include/mscat.h b/include/mscat.h
index a45e024422c..7c5c86b71b0 100644
--- a/include/mscat.h
+++ b/include/mscat.h
@@ -38,6 +38,22 @@ extern "C" {
 #define CRYPTCAT_OPEN_SORTED                0x40000000
 #define CRYPTCAT_OPEN_FLAGS_MASK            0xffff0000
 
+#define CRYPTCAT_E_AREA_HEADER              0x00000000
+#define CRYPTCAT_E_AREA_MEMBER              0x00010000
+#define CRYPTCAT_E_AREA_ATTRIBUTE           0x00020000
+
+#define CRYPTCAT_E_CDF_UNSUPPORTED          0x00000001
+#define CRYPTCAT_E_CDF_DUPLICATE            0x00000002
+#define CRYPTCAT_E_CDF_TAGNOTFOUND          0x00000004
+
+#define CRYPTCAT_E_CDF_MEMBER_FILE_PATH     0x00010001
+#define CRYPTCAT_E_CDF_MEMBER_INDIRECTDATA  0x00010002
+#define CRYPTCAT_E_CDF_MEMBER_FILENOTFOUND  0x00010004
+
+#define CRYPTCAT_E_CDF_BAD_GUID_CONV        0x00020001
+#define CRYPTCAT_E_CDF_ATTR_TOOFEWVALUES    0x00020002
+#define CRYPTCAT_E_CDF_ATTR_TYPECOMBO       0x00020004
+
 #include <pshpack8.h>
 
 typedef struct CRYPTCATATTRIBUTE_