diff --git a/code/datums/wires/airlock.dm b/code/datums/wires/airlock.dm
index dafc910b36..c08239af30 100644
--- a/code/datums/wires/airlock.dm
+++ b/code/datums/wires/airlock.dm
@@ -79,7 +79,7 @@
 			if(!A.secondsElectrified)
 				A.set_electrified(30)
 				if(usr)
-					A.shockedby += text("\[[time_stamp()]\][usr](ckey:[usr.ckey])")
+					LAZYADD(A.shockedby, text("\[[time_stamp()]\][usr](ckey:[usr.ckey])"))
 				add_logs(usr, A, "electrified")
 		if(WIRE_SAFETY)
 			A.safe = !A.safe
@@ -134,7 +134,7 @@
 				if(A.secondsElectrified != -1)
 					A.set_electrified(-1)
 					if(usr)
-						A.shockedby += text("\[[time_stamp()]\][usr](ckey:[usr.ckey])")
+						LAZYADD(A.shockedby, text("\[[time_stamp()]\][usr](ckey:[usr.ckey])"))
 					add_logs(usr, A, "electrified")
 		if(WIRE_SAFETY) // Cut to disable safeties, mend to re-enable.
 			A.safe = mend
diff --git a/code/game/machinery/doors/airlock.dm b/code/game/machinery/doors/airlock.dm
index db0a9a5866..00c683af85 100644
--- a/code/game/machinery/doors/airlock.dm
+++ b/code/game/machinery/doors/airlock.dm
@@ -1280,7 +1280,7 @@
 		bolt() //Bolt it!
 		set_electrified(ELECTRIFIED_PERMANENT)  //Shock it!
 		if(origin)
-			shockedby += "\[[time_stamp()]\][origin](ckey:[origin.ckey])"
+			LAZYADD(shockedby, "\[[time_stamp()]\][origin](ckey:[origin.ckey])")
 
 
 /obj/machinery/door/airlock/disable_lockdown()
@@ -1549,7 +1549,7 @@
 	if(wires.is_cut(WIRE_SHOCK))
 		to_chat(user, "The electrification wire has been cut")
 	else
-		shockedby += "\[[time_stamp()]\][user](ckey:[user.ckey])"
+		LAZYADD(shockedby, "\[[time_stamp()]\][user](ckey:[user.ckey])")
 		add_logs(user, src, "electrified")
 		set_electrified(AI_ELECTRIFY_DOOR_TIME)
 
@@ -1559,7 +1559,7 @@
 	if(wires.is_cut(WIRE_SHOCK))
 		to_chat(user, "The electrification wire has been cut")
 	else
-		shockedby += text("\[[time_stamp()]\][user](ckey:[user.ckey])")
+		LAZYADD(shockedby, text("\[[time_stamp()]\][user](ckey:[user.ckey])"))
 		add_logs(user, src, "electrified")
 		set_electrified(ELECTRIFIED_PERMANENT)
 
diff --git a/code/game/machinery/doors/door.dm b/code/game/machinery/doors/door.dm
index ed92d9f385..de1cb36ea7 100644
--- a/code/game/machinery/doors/door.dm
+++ b/code/game/machinery/doors/door.dm
@@ -16,7 +16,7 @@
 	interaction_flags_atom = INTERACT_ATOM_UI_INTERACT
 
 	var/secondsElectrified = 0
-	var/shockedby = list()
+	var/shockedby
 	var/visible = TRUE
 	var/operating = FALSE
 	var/glass = FALSE
@@ -213,7 +213,7 @@
 	if(prob(severity*10 - 20))
 		if(secondsElectrified == 0)
 			secondsElectrified = -1
-			shockedby += "\[[time_stamp()]\]EM Pulse"
+			LAZYADD(shockedby, "\[[time_stamp()]\]EM Pulse")
 			addtimer(CALLBACK(src, .proc/unelectrify), 300)
 	..()
 
diff --git a/code/modules/assembly/doorcontrol.dm b/code/modules/assembly/doorcontrol.dm
index f320872076..6780f23677 100644
--- a/code/modules/assembly/doorcontrol.dm
+++ b/code/modules/assembly/doorcontrol.dm
@@ -55,7 +55,7 @@
 			if(specialfunctions & SHOCK)
 				if(D.secondsElectrified)
 					D.secondsElectrified = -1
-					D.shockedby += "\[[time_stamp()]\][usr](ckey:[usr.ckey])"
+					LAZYADD(D.shockedby, "\[[time_stamp()]\][usr](ckey:[usr.ckey])")
 					add_logs(usr, D, "electrified")
 				else
 					D.secondsElectrified = 0