diff --git a/src/machi.proto b/src/machi.proto
index 8a4bf15..80a39e7 100644
--- a/src/machi.proto
+++ b/src/machi.proto
@@ -45,6 +45,7 @@ enum Mpb_GeneralStatusCode {
      WRITTEN = 6;
      NO_SUCH_FILE = 7;
      PARTIAL_READ = 8;
+     BAD_EPOCH = 9;
      BAD_JOSS = 255;    // Only for testing by the Taipan
 }
 
diff --git a/src/machi_pb_high_client.erl b/src/machi_pb_high_client.erl
index 5e34794..21f6cd0 100644
--- a/src/machi_pb_high_client.erl
+++ b/src/machi_pb_high_client.erl
@@ -374,6 +374,8 @@ convert_general_status_code('NO_SUCH_FILE') ->
     {error, no_such_file};
 convert_general_status_code('PARTIAL_READ') ->
     {error, partial_read};
+convert_general_status_code('BAD_EPOCH') ->
+    {error, bad_epoch};
 convert_general_status_code('BAD_JOSS') ->
     throw({error, bad_joss_taipan_fixme}).
 
diff --git a/src/machi_pb_translate.erl b/src/machi_pb_translate.erl
index ce5fd40..8e4ae21 100644
--- a/src/machi_pb_translate.erl
+++ b/src/machi_pb_translate.erl
@@ -825,6 +825,8 @@ conv_from_status({error, no_such_file}) ->
     'NO_SUCH_FILE';
 conv_from_status({error, partial_read}) ->
     'PARTIAL_READ';
+conv_from_status({error, bad_epoch}) ->
+    'BAD_EPOCH';
 conv_from_status(_OOPS) ->
     io:format(user, "HEY, ~s:~w got ~w\n", [?MODULE, ?LINE, _OOPS]),
     'BAD_JOSS'.