diff --git a/coal-crafter.lua b/coal-crafter.lua
index f5465a8..0267bb7 100644
--- a/coal-crafter.lua
+++ b/coal-crafter.lua
@@ -80,7 +80,7 @@ local function main()
     bufferInventory = turtleUtils.waitForInventory('front', WAIT_INVENTORY_TIME)
 
     local coalEssenceSlot = waitForCoalEssence(storageInventory)
-    local pushOk = storageInventory.pushItems(peripheral.getName(bufferInventory), coalEssenceSlot)
+    local pushOk = storageInventory.pushItems(peripheral.getName(bufferInventory), coalEssenceSlot, MIN_ESSENCE_NEEDED)
 
     if not pushOk then
       error('cannot pushItems from storage to buffer')