diff --git a/packages/ditto/controllers/api/cashu.ts b/packages/ditto/controllers/api/cashu.ts
index cdd0f911..bd2b2777 100644
--- a/packages/ditto/controllers/api/cashu.ts
+++ b/packages/ditto/controllers/api/cashu.ts
@@ -170,7 +170,7 @@ const createWalletSchema = z.object({
  * https://github.com/nostr-protocol/nips/blob/master/61.md#nutzap-informational-event
  */
 route.put('/wallet', userMiddleware({ enc: 'nip44' }), async (c) => {
-  const { user, relay, signal } = c.var;
+  const { user, relay, signal, conf } = c.var;
 
   const pubkey = await user.signer.getPublicKey();
   const body = await parseBody(c.req.raw);
@@ -209,6 +209,10 @@ route.put('/wallet', userMiddleware({ enc: 'nip44' }), async (c) => {
     walletContentTags.push(['mint', mint]);
   }
 
+  if (relays.length < 1) {
+    relays.push(conf.relay);
+  }
+
   const encryptedWalletContentTags = await user.signer.nip44.encrypt(pubkey, JSON.stringify(walletContentTags));
 
   // Wallet