diff --git a/packages/ditto/controllers/api/captcha.ts b/packages/ditto/controllers/api/captcha.ts
index 0f1f9ac4..d96e684a 100644
--- a/packages/ditto/controllers/api/captcha.ts
+++ b/packages/ditto/controllers/api/captcha.ts
@@ -10,6 +10,11 @@ interface Point {
   y: number;
 }
 
+const pointSchema: z.ZodType<Point> = z.object({
+  x: z.number(),
+  y: z.number(),
+});
+
 const captchas = new TTLCache<string, Point>();
 const imagesAsync = getCaptchaImages();
 
@@ -42,11 +47,6 @@ export const captchaController: AppController = async (c) => {
   });
 };
 
-const pointSchema = z.object({
-  x: z.number(),
-  y: z.number(),
-});
-
 /** Verify the captcha solution and sign an event in the database. */
 export const captchaVerifyController: AppController = async (c) => {
   const { user } = c.var;