diff --git a/code/game/machinery/computer/prisoner.dm b/code/game/machinery/computer/prisoner.dm
index c6aa932c6cf..c91828b71c2 100644
--- a/code/game/machinery/computer/prisoner.dm
+++ b/code/game/machinery/computer/prisoner.dm
@@ -132,8 +132,9 @@
 
 		else if(href_list["warn"])
 			var/warning = copytext(sanitize(input(usr,"Message:","Enter your message here!","")),1,MAX_MESSAGE_LEN)
-			if(!warning) return
-			var/obj/item/weapon/implant/I = locate(href_list["warn"]) in tracked_chem_implants
+			if(!warning)
+				return
+			var/obj/item/weapon/implant/I = locate(href_list["warn"]) in tracked_implants
 			if(I && istype(I) && I.imp_in)
 				var/mob/living/R = I.imp_in
 				to_chat(R, "<span class='italics'>You hear a voice in your head saying: '[warning]'</span>")