diff --git a/SeaBlock/changelog.txt b/SeaBlock/changelog.txt
index 0398be1..d5d7783 100644
--- a/SeaBlock/changelog.txt
+++ b/SeaBlock/changelog.txt
@@ -2,6 +2,7 @@
 Version: 0.5.16
 Date: ???
   Bugfixes:
+    - Landfill tech not ignoring tech cost multiplier #320
     - Milestones error when mod setting Default landfill type set to Landfill #321
 ---------------------------------------------------------------------------------------------------
 Version: 0.5.15
diff --git a/SeaBlock/data-updates/landfill.lua b/SeaBlock/data-updates/landfill.lua
index 139ffe4..16bc055 100644
--- a/SeaBlock/data-updates/landfill.lua
+++ b/SeaBlock/data-updates/landfill.lua
@@ -38,3 +38,4 @@ data.raw.technology["landfill"].unit = {
   time = 15,
 }
 bobmods.lib.tech.remove_prerequisite("water-washing-2", "landfill")
+bobmods.lib.tech.ignore_tech_cost_multiplier("landfill", true)