diff --git a/unix/tar_unix.mli b/unix/tar_unix.mli
index 509ca9b..eda3e75 100644
--- a/unix/tar_unix.mli
+++ b/unix/tar_unix.mli
@@ -20,7 +20,6 @@ type decode_error = [
   | `Fatal of Tar.error
   | `Unix of Unix.error * string * string
   | `Unexpected_end_of_file
-  | `Msg of string
 ]
 
 type t