diff --git a/src/utils/mrz.ts b/src/utils/mrz.ts
index c300aab2..d9774994 100644
--- a/src/utils/mrz.ts
+++ b/src/utils/mrz.ts
@@ -139,7 +139,7 @@ function mrzCleanResult(obj: Record<string, string>) {
   return obj;
 }
 
-export function checkData(data: string, num: number) {
+export function checkSum(data: string) {
   const sum = data.split('').reduce((a, v, i) => {
     const num = Number(v);
     const weight = [7, 3, 1][i % 3];
@@ -149,7 +149,7 @@ export function checkData(data: string, num: number) {
     }
     return a + num * weight;
   }, 0);
-  return sum % 10 === num;
+  return sum % 10;
 }
 
 export function parseType1(mrz: MRZ) {