diff --git a/src/controllers/api/accounts.ts b/src/controllers/api/accounts.ts
index ba8590a4..3dc1e815 100644
--- a/src/controllers/api/accounts.ts
+++ b/src/controllers/api/accounts.ts
@@ -295,7 +295,7 @@ const updateCredentialsController: AppController = async (c) => {
   }
 
   const keys = Object.keys(result.data);
-  let event: NostrEvent;
+  let event: NostrEvent | undefined;
 
   if (keys.length === 1 && keys[0] === 'pleroma_settings_store') {
     event = (await store.query([{ kinds: [0], authors: [pubkey] }]))[0];
@@ -350,6 +350,10 @@ const updateCredentialsController: AppController = async (c) => {
     );
   }
 
+  if (!event) {
+    return c.json({ error: 'Account not found.' }, 400);
+  }
+
   const settingsStore = result.data.pleroma_settings_store;
   const account = await renderAccount(event, { withSource: true, settingsStore });