diff --git a/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.md b/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.md
index 9c26bb9d1cc..6565e447417 100644
--- a/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.md
+++ b/curriculum/challenges/english/06-quality-assurance/quality-assurance-projects/sudoku-solver.md
@@ -270,7 +270,7 @@ async (getUserInput) => {
 };
 ```
 
-If the object submitted to `/api/check` is missing `puzzle`, `coordinate` or `value`, the returned value will be `{ error: Required field(s) missing }`
+If the object submitted to `/api/check` is missing `puzzle`, `coordinate` or `value`, the returned value will be `{ error: 'Required field(s) missing' }`
 
 ```js
 async (getUserInput) => {