diff --git a/include/winnt.h b/include/winnt.h
index 2e1aac0f477..c1f007d0536 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -2267,8 +2267,15 @@ NTSYSAPI PVOID   WINAPI RtlVirtualUnwind(DWORD,ULONG_PTR,ULONG_PTR,RUNTIME_FUNCT
 #define WT_TRANSFER_IMPERSONATION      0x0100
 
 
-#define EXCEPTION_CONTINUABLE        0
+#define EXCEPTION_CONTINUABLE        0x00
 #define EXCEPTION_NONCONTINUABLE     0x01
+#define EXCEPTION_UNWINDING          0x02
+#define EXCEPTION_EXIT_UNWIND        0x04
+#define EXCEPTION_STACK_INVALID      0x08
+#define EXCEPTION_NESTED_CALL        0x10
+#define EXCEPTION_TARGET_UNWIND      0x20
+#define EXCEPTION_COLLIDED_UNWIND    0x40
+#define EXCEPTION_SOFTWARE_ORIGINATE 0x80
 
 /*
  * The exception record used by Win32 to give additional information