diff --git a/packages/taler-util/src/wallet-types.ts b/packages/taler-util/src/wallet-types.ts
index 3710e6d3c..1b55591b1 100644
--- a/packages/taler-util/src/wallet-types.ts
+++ b/packages/taler-util/src/wallet-types.ts
@@ -1544,6 +1544,7 @@ export const codecForIntegrationTestV2Args = (): Codec<IntegrationTestV2Args> =>
 
 export interface AddExchangeRequest {
   exchangeBaseUrl: string;
+  masterPub?: string;
   forceUpdate?: boolean;
 }
 
@@ -1551,6 +1552,7 @@ export const codecForAddExchangeRequest = (): Codec<AddExchangeRequest> =>
   buildCodecForObject<AddExchangeRequest>()
     .property("exchangeBaseUrl", codecForString())
     .property("forceUpdate", codecOptional(codecForBoolean()))
+    .property("masterPub", codecOptional(codecForString()))
     .build("AddExchangeRequest");
 
 export interface ForceExchangeUpdateRequest {