diff --git a/grading_data_generator.go b/grading_data_generator.go
index cd0f084..a30b8da 100644
--- a/grading_data_generator.go
+++ b/grading_data_generator.go
@@ -676,7 +676,7 @@ func SaveInstructorsSections(assignments []InstructorsSections) {
 	defer f.Close()
 
 	w := csv.NewWriter(f)
-	if err := w.Write([]string{"instructor_id", "section_id"}); err != nil {
+	if err := w.Write([]string{"uid", "section_id"}); err != nil {
 		log.Fatalf("failed to write csv header: %v", err)
 	}
 	for _, a := range assignments {