diff --git a/include/winbase.h b/include/winbase.h
index b87114fea12..2cb3d1ac6ce 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -707,6 +707,9 @@ typedef struct _TIME_ZONE_INFORMATION{
 #define FILE_FLAG_BACKUP_SEMANTICS      0x02000000
 #define FILE_FLAG_POSIX_SEMANTICS       0x01000000
 #define FILE_FLAG_OPEN_REPARSE_POINT    0x00200000
+#define FILE_FLAG_OPEN_NO_RECALL        0x00100000
+#define FILE_FLAG_FIRST_PIPE_INSTANCE   0x00080000
+
 #define CREATE_NEW              1
 #define CREATE_ALWAYS           2
 #define OPEN_EXISTING           3