diff --git a/packages/taler-util/src/wallet-types.ts b/packages/taler-util/src/wallet-types.ts
index 2f9d3bb04..41b0d5574 100644
--- a/packages/taler-util/src/wallet-types.ts
+++ b/packages/taler-util/src/wallet-types.ts
@@ -1686,7 +1686,7 @@ export interface PrepareTipRequest {
 
 export const codecForPrepareTipRequest = (): Codec<PrepareTipRequest> =>
   buildCodecForObject<PrepareTipRequest>()
-    .property("talerTipUri", codecForTransactionIdStr())
+    .property("talerTipUri", codecForString())
     .build("PrepareTipRequest");
 
 export interface AcceptTipRequest {