diff --git a/app/controllers/managements_controller.rb b/app/controllers/managements_controller.rb
index d293de2d5..b04334ee0 100644
--- a/app/controllers/managements_controller.rb
+++ b/app/controllers/managements_controller.rb
@@ -678,7 +678,7 @@ end
       @courses = @courses.where(:homepage_show => params[:homepage_show].to_i)
     end
 
-    if params[:course_list]
+    if params[:course_list] && params[:course_list] != ''
       @courses = @courses.where(:course_list_id => courselist)
     end
     if params[:status] && params[:status]!=''