diff --git a/lib/http/client.js b/lib/http/client.js
index 52ca58d6..48ff6b79 100644
--- a/lib/http/client.js
+++ b/lib/http/client.js
@@ -673,7 +673,7 @@ HTTPClient.prototype.retoken = async function retoken(id, passphrase) {
  */
 
 HTTPClient.prototype.setPassphrase = function setPassphrase(id, old, new_) {
-  const body = { old: old, passphrase: new_ };
+  const body = { old: old, new: new_ };
   return this._post(`/wallet/${id}/passphrase`, body);
 };