diff --git a/win32/include/winapi/winnt.h b/win32/include/winapi/winnt.h
index e4714f62..49217351 100644
--- a/win32/include/winapi/winnt.h
+++ b/win32/include/winapi/winnt.h
@@ -4019,10 +4019,16 @@ typedef DWORD LCID;
 #define IMAGE_SUBSYSTEM_EFI_ROM 13
 #define IMAGE_SUBSYSTEM_XBOX 14
 
+#define IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA 0x0020
+#define IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE 0x0040
+#define IMAGE_DLLCHARACTERISTICS_FORCE_INTEGRITY 0x0080
+#define IMAGE_DLLCHARACTERISTICS_NX_COMPAT 0x0100
 #define IMAGE_DLLCHARACTERISTICS_NO_ISOLATION 0x0200
 #define IMAGE_DLLCHARACTERISTICS_NO_SEH 0x0400
 #define IMAGE_DLLCHARACTERISTICS_NO_BIND 0x0800
+#define IMAGE_DLLCHARACTERISTICS_APPCONTAINER 0x1000
 #define IMAGE_DLLCHARACTERISTICS_WDM_DRIVER 0x2000
+#define IMAGE_DLLCHARACTERISTICS_GUARD_CF 0x4000
 #define IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE 0x8000
 
 #define IMAGE_DIRECTORY_ENTRY_EXPORT 0