diff --git a/src/unixfs.proto.js b/src/unixfs.proto.js
index a3307eeb..23f1e7db 100644
--- a/src/unixfs.proto.js
+++ b/src/unixfs.proto.js
@@ -17,6 +17,12 @@ module.exports = `message Data {
 
   optional uint64 hashType = 5;
   optional uint64 fanout = 6;
+  
+  /* file permissions */
+  optional uint32 mode = 7;
+
+  /* file time data */
+  optional uint32 mtime = 8;
 }
 
 message Metadata {