diff --git a/packages/stack-shared/src/known-errors.tsx b/packages/stack-shared/src/known-errors.tsx
index e3e9dda91..fd86c8652 100644
--- a/packages/stack-shared/src/known-errors.tsx
+++ b/packages/stack-shared/src/known-errors.tsx
@@ -528,7 +528,7 @@ const EmailVerificationError = createKnownErrorConstructor(
 );
 
 const EmailVerificationCodeError = createKnownErrorConstructor(
-  KnownError,
+  EmailVerificationError,
   "EMAIL_VERIFICATION_CODE_ERROR",
   "inherit",
   "inherit",
diff --git a/packages/stack/src/lib/stack-app.ts b/packages/stack/src/lib/stack-app.ts
index a953f7dbe..ca282be15 100644
--- a/packages/stack/src/lib/stack-app.ts
+++ b/packages/stack/src/lib/stack-app.ts
@@ -113,6 +113,7 @@ export type StackClientAppJson<HasTokenStore extends boolean, ProjectId extends
   uniqueIdentifier: string,
   currentClientUserJson: UserJson | null,
   currentProjectJson: ClientProjectJson,
+  // note: if you add more fields here, make sure to ensure the checkString in the constructor has/doesn't have them
 };
 
 const defaultBaseUrl = "https://app.stack-auth.com";