diff --git a/actor.js b/actor.js
index bfefea9c..2028082b 100644
--- a/actor.js
+++ b/actor.js
@@ -8,4 +8,4 @@ export default class Actor {
     }
 }
 
-registerType(Actor, ['chainId', 'app', 'address']);
+registerType(Actor, ['chainId', 'app', 'address'], 0x00);
diff --git a/modules/auth.js b/modules/auth.js
index cf1924a9..9cb73449 100644
--- a/modules/auth.js
+++ b/modules/auth.js
@@ -7,7 +7,7 @@ export class Signed {
     }
 }
 
-registerType(Signed, ['sig', 'pubkey']);
+registerType(Signed, ['sig', 'pubkey'], 0x00);
 
 export class OneSigTx {
     constructor(tx, signed) {
diff --git a/wire.js b/wire.js
index 7230aa85..35de92d2 100644
--- a/wire.js
+++ b/wire.js
@@ -4,7 +4,7 @@ const unexportedType = 0x00;
 
 const typeRegistry = new Map();
 
-export function registerType(type, fields, id = unexportedType) {
+export function registerType(type, fields, id) {
     typeRegistry.set(type, {'id': id, 'fields': fields});
 }