diff --git a/code/modules/plumbing/plumbers/medipenrefill.dm b/code/modules/plumbing/plumbers/medipenrefill.dm
index 195d866a38..fb7553a4d5 100644
--- a/code/modules/plumbing/plumbers/medipenrefill.dm
+++ b/code/modules/plumbing/plumbers/medipenrefill.dm
@@ -39,7 +39,7 @@
 		return
 	if(istype(I, /obj/item/reagent_containers) && I.is_open_container())
 		var/obj/item/reagent_containers/RC = I
-		var/units = RC.reagents.trans_to(src, RC.amount_per_transfer_from_this, transfered_by = user)
+		var/units = RC.reagents.trans_to(src, RC.amount_per_transfer_from_this)
 		if(units)
 			to_chat(user, "<span class='notice'>You transfer [units] units of the solution to the [name].</span>")
 			return