diff --git a/reactos/include/pe.h b/reactos/include/pe.h
index d903d8f0aae..c083557848e 100644
--- a/reactos/include/pe.h
+++ b/reactos/include/pe.h
@@ -590,6 +590,7 @@ typedef struct _IMAGE_RESOURCE_DIRECTORY {
 #define IMAGE_SUBSYSTEM_OS2_CUI		5
 #define IMAGE_SUBSYSTEM_POSIX_GUI	6
 #define IMAGE_SUBSYSTEM_POSIX_CUI	7
+#define IMAGE_SUBSYSTEM_NATIVE_WINDOWS	8
 #define IMAGE_SUBSYSTEM_WINDOWS_CE_GUI	9
 #define IMAGE_SUBSYSTEM_EFI_APPLICATION	10
 #define IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER	11