diff --git a/lib/server.js b/lib/server.js
index f687839..a72a2dd 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -128,7 +128,7 @@ WalletService.prototype.createWallet = function(opts, cb) {
         return acb();
 
       self.storage.fetchWallet(opts.id, function(err, wallet) {
-        if (wallet) return acb(new ClientError('Wallet already exists'));
+        if (wallet) return acb(new ClientError('WEXISTS', 'Wallet already exists'));
         return acb(err);
       });
     },