diff --git a/src/proto_alpha/lib_protocol/src/baking.mli b/src/proto_alpha/lib_protocol/src/baking.mli
index 9d590ad51..2d6165291 100644
--- a/src/proto_alpha/lib_protocol/src/baking.mli
+++ b/src/proto_alpha/lib_protocol/src/baking.mli
@@ -15,6 +15,8 @@ type error += Invalid_fitness_gap of int64 * int64 (* `Permanent *)
 type error += Timestamp_too_early of Timestamp.t * Timestamp.t (* `Permanent *)
 type error += Invalid_block_signature of Block_hash.t * Signature.Public_key_hash.t (* `Permanent *)
 type error += Unexpected_endorsement
+type error += Invalid_signature  (* `Permanent *)
+type error += Invalid_stamp  (* `Permanent *)
 
 (** [minimal_time ctxt priority pred_block_time] returns the minimal
     time, given the predecessor block timestamp [pred_block_time],
diff --git a/src/proto_alpha/lib_protocol/src/raw_context.mli b/src/proto_alpha/lib_protocol/src/raw_context.mli
index 0e7f065cd..d31370c83 100644
--- a/src/proto_alpha/lib_protocol/src/raw_context.mli
+++ b/src/proto_alpha/lib_protocol/src/raw_context.mli
@@ -9,6 +9,8 @@
 
 (** {1 Errors} ****************************************************************)
 
+type error += Too_many_internal_operations (* `Permanent *)
+
 (** An internal storage error that should not happen *)
 type storage_error =
   | Incompatible_protocol_version of string
diff --git a/src/proto_alpha/lib_protocol/src/roll_storage.mli b/src/proto_alpha/lib_protocol/src/roll_storage.mli
index 680b39b8e..4e62893ef 100644
--- a/src/proto_alpha/lib_protocol/src/roll_storage.mli
+++ b/src/proto_alpha/lib_protocol/src/roll_storage.mli
@@ -20,6 +20,7 @@
 type error +=
   | Consume_roll_change
   | No_roll_for_delegate
+  | No_roll_snapshot_for_cycle of Cycle_repr.t
   | Unregistered_delegate of Signature.Public_key_hash.t (* `Permanent *)
 
 val init : Raw_context.t -> Raw_context.t tzresult Lwt.t