diff --git a/Backend/Controllers/BuildMenuController.cs b/Backend/Controllers/BuildMenuController.cs
index e97b30c..b7c7d35 100644
--- a/Backend/Controllers/BuildMenuController.cs
+++ b/Backend/Controllers/BuildMenuController.cs
@@ -56,7 +56,7 @@ namespace Backend.Controllers
                                     from (
                                         select main_system_tag from building_menu bm where bm.building_tag = @building_tag group by bm.main_system_tag
                                     ) bm
-                                    left join variable v on v.system_value = bm.main_system_tag AND v.system_type = @main_system_type and v.deleted = 0
+                                    join variable v on v.system_value = bm.main_system_tag AND v.system_type = @main_system_type and v.deleted = 0
                                     ORDER BY v.system_priority ASC";
 
                 var param = new { building_tag = building_tag, main_system_type = main_system_type };