diff --git a/reactos/include/pe.h b/reactos/include/pe.h
index b61875874b3..09a2f84f961 100644
--- a/reactos/include/pe.h
+++ b/reactos/include/pe.h
@@ -527,7 +527,7 @@ typedef struct _IMAGE_RESOURCE_DIRECTORY {
 #define IMAGE_SUBSYSTEM_POSIX_GUI	6
 #define IMAGE_SUBSYSTEM_POSIX_CUI	7
 #define IMAGE_SUBSYSTEM_WINDOWS_CE_GUI	9
-
+#define IMAGE_SUBSYSTEM_XBOX		14
 
 
 // Directory Entries