diff --git a/packages/apps-config/src/api/spec/kulupu.ts b/packages/apps-config/src/api/spec/kulupu.ts
index c8c09025d4..00f04b0799 100644
--- a/packages/apps-config/src/api/spec/kulupu.ts
+++ b/packages/apps-config/src/api/spec/kulupu.ts
@@ -5,6 +5,8 @@
 /* eslint-disable sort-keys */
 
 export default {
+  Address: 'MultiAddress',
+  LookupSource: 'MultiAddress',
   Difficulty: 'U256',
   DifficultyAndTimestamp: {
     difficulty: 'Difficulty',