diff --git a/cmd/mount/file.go b/cmd/mount/file.go
index 4d31fcf8a..e15283710 100644
--- a/cmd/mount/file.go
+++ b/cmd/mount/file.go
@@ -62,6 +62,7 @@ func (f *File) Attr(ctx context.Context, a *fuse.Attr) error {
 			a.Crtime = modTime
 		}
 	}
+	a.Blocks = (a.Size + 511) / 512
 	return nil
 }