diff --git a/src/api/na.ts b/src/api/na.ts
index 5a128db..103f904 100644
--- a/src/api/na.ts
+++ b/src/api/na.ts
@@ -26,11 +26,14 @@ export async function getNintendoAccountSessionToken(code: string, verifier: str
         signal,
     }).finally(cancel);
 
-    const token = await response.json() as NintendoAccountSessionToken | NintendoAccountError;
+    const token = await response.json() as NintendoAccountSessionToken | NintendoAccountAuthError | NintendoAccountError;
 
     if ('errorCode' in token) {
         throw new ErrorResponse('[na] ' + token.detail, response, token);
     }
+    if ('error' in token) {
+        throw new ErrorResponse('[na] ' + token.error_description ?? token.error, response, token);
+    }
 
     debug('Got Nintendo Account session token', token);
 
@@ -56,11 +59,14 @@ export async function getNintendoAccountToken(token: string, client_id: string)
         signal,
     }).finally(cancel);
 
-    const nintendoAccountToken = await response.json() as NintendoAccountToken | NintendoAccountError;
+    const nintendoAccountToken = await response.json() as NintendoAccountToken | NintendoAccountAuthError | NintendoAccountError;
 
     if ('errorCode' in nintendoAccountToken) {
         throw new ErrorResponse('[na] ' + nintendoAccountToken.detail, response, nintendoAccountToken);
     }
+    if ('error' in nintendoAccountToken) {
+        throw new ErrorResponse('[na] ' + nintendoAccountToken.error_description ?? nintendoAccountToken.error, response, nintendoAccountToken);
+    }
 
     debug('Got Nintendo Account token', nintendoAccountToken);
 
@@ -278,6 +284,11 @@ export interface Mii {
     type: 'profile';
 }
 
+export interface NintendoAccountAuthError {
+    error: string;
+    error_description: string;
+}
+
 export interface NintendoAccountError {
     errorCode: string;
     detail: string;