diff --git a/src/utils/gpa-utils.ts b/src/utils/gpa-utils.ts
index 550a2b3..d36911b 100644
--- a/src/utils/gpa-utils.ts
+++ b/src/utils/gpa-utils.ts
@@ -42,7 +42,7 @@ export class GPAUtils
         // Remove all courses that does not have a grade
         coursesOriginal.forEach(course =>
         {
-            if (course.numericGrade == null || course.numericGrade == 0)
+            if (course.letterGrade == null || course.letterGrade == "")
             {
                 accurate = false;
             }