diff --git a/code/datums/components/material_container.dm b/code/datums/components/material_container.dm
index 9989859bbbb..89717b1b0a8 100644
--- a/code/datums/components/material_container.dm
+++ b/code/datums/components/material_container.dm
@@ -116,7 +116,7 @@
 		user.put_in_active_hand(I)
 
 /// Proc specifically for inserting items, returns the amount of materials entered.
-/datum/component/material_container/proc/insert_item(obj/item/I, var/multiplier = 1, amt)
+/datum/component/material_container/proc/insert_item(obj/item/I, amt=1, multiplier = 1)
 	if(!I)
 		return FALSE
 
diff --git a/code/game/machinery/recycler.dm b/code/game/machinery/recycler.dm
index 6a5a613a0e5..989aa96a132 100644
--- a/code/game/machinery/recycler.dm
+++ b/code/game/machinery/recycler.dm
@@ -152,7 +152,7 @@
 		var/material_amount = materials.get_item_material_amount(I)
 		if(!material_amount)
 			return
-		materials.insert_item(I, multiplier = (amount_produced / 100))
+		materials.insert_item(I, material_amount, multiplier = (amount_produced / 100))
 		materials.retrieve_all()