diff --git a/src/utils/ocr.ts b/src/utils/ocr.ts
index 6c01f4a9..bcfabe84 100644
--- a/src/utils/ocr.ts
+++ b/src/utils/ocr.ts
@@ -5,10 +5,12 @@ import { parseMRZ } from './mrz';
 let worker: Tesseract.Worker;
 
 export function runOcr(image: ImageLike): Promise<void>;
-export function runOcr<T extends (result: RecognizeResult) => void>(
+export function runOcr<
+  CallbackFunction extends (result: RecognizeResult) => void,
+>(
   image: ImageLike,
-  callback: T,
-): Promise<ReturnType<T>>;
+  callback: CallbackFunction,
+): Promise<ReturnType<CallbackFunction>>;
 export async function runOcr<T extends (result: RecognizeResult) => void>(
   image: ImageLike,
   callback?: T,