diff --git a/windows/types_windows.go b/windows/types_windows.go
index 141ca81b..bbf19f0d 100644
--- a/windows/types_windows.go
+++ b/windows/types_windows.go
@@ -126,9 +126,19 @@ const (
 	OPEN_ALWAYS       = 4
 	TRUNCATE_EXISTING = 5
 
-	FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000
-	FILE_FLAG_BACKUP_SEMANTICS   = 0x02000000
-	FILE_FLAG_OVERLAPPED         = 0x40000000
+	FILE_FLAG_OPEN_REQUIRING_OPLOCK = 0x00040000
+	FILE_FLAG_FIRST_PIPE_INSTANCE   = 0x00080000
+	FILE_FLAG_OPEN_NO_RECALL        = 0x00100000
+	FILE_FLAG_OPEN_REPARSE_POINT    = 0x00200000
+	FILE_FLAG_SESSION_AWARE         = 0x00800000
+	FILE_FLAG_POSIX_SEMANTICS       = 0x01000000
+	FILE_FLAG_BACKUP_SEMANTICS      = 0x02000000
+	FILE_FLAG_DELETE_ON_CLOSE       = 0x04000000
+	FILE_FLAG_SEQUENTIAL_SCAN       = 0x08000000
+	FILE_FLAG_RANDOM_ACCESS         = 0x10000000
+	FILE_FLAG_NO_BUFFERING          = 0x20000000
+	FILE_FLAG_OVERLAPPED            = 0x40000000
+	FILE_FLAG_WRITE_THROUGH         = 0x80000000
 
 	HANDLE_FLAG_INHERIT    = 0x00000001
 	STARTF_USESTDHANDLES   = 0x00000100