diff --git a/src/components/app/app.ts b/src/components/app/app.ts
index 29ea13d..42b8368 100644
--- a/src/components/app/app.ts
+++ b/src/components/app/app.ts
@@ -195,7 +195,7 @@ export default class App extends Vue
             // Check if total-average grade is the same with percent-type grade
             if (course.numericGrade == GPAUtils.getTotalMeanAverage(course))
             {
-                course.grading.method = 'TOTAL_AVERAGE';
+                course.grading = {method: 'TOTAL_AVERAGE', weightingMap: {}};
             }
             else
             {