diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 909f1c11d..f6868cfa2 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -1547,7 +1547,7 @@ class CoursesController < ApplicationController
   def watch_statics
     course_videos = @course.course_videos.joins(:watch_course_videos).joins("
       JOIN course_members ON course_members.user_id = watch_course_videos.user_id AND course_members.course_id = #{@course.id} AND role = 4
-    ")
+    ").where("watch_course_videos.end_at IS NOT NULL")
     @total_duration = course_videos.sum(:total_duration).round(0)
     @frequencies = course_videos.joins("JOIN watch_video_histories ON watch_course_videos.id = watch_video_histories.watch_course_video_id").count(:id)
     @people_num = course_videos.count(:id)