diff --git a/code/__HELPERS/unsorted.dm b/code/__HELPERS/unsorted.dm
index a85c69e7b81..928561abe94 100644
--- a/code/__HELPERS/unsorted.dm
+++ b/code/__HELPERS/unsorted.dm
@@ -1314,44 +1314,32 @@ var/global/list/common_tools = list(
 Checks if that loc and dir has a item on the wall
 */
 var/list/WALLITEMS = list(
-	"/obj/machinery/power/apc", "/obj/machinery/alarm", "/obj/item/device/radio/intercom",
-	"/obj/structure/extinguisher_cabinet", "/obj/structure/reagent_dispensers/peppertank",
-	"/obj/machinery/status_display", "/obj/machinery/requests_console", "/obj/machinery/light_switch", "/obj/effect/sign",
-	"/obj/machinery/newscaster", "/obj/machinery/firealarm", "/obj/structure/noticeboard", "/obj/machinery/door_control",
-	"/obj/machinery/computer/security/telescreen", "/obj/machinery/embedded_controller/radio/simple_vent_controller",
-	"/obj/item/weapon/storage/secure/safe", "/obj/machinery/door_timer", "/obj/machinery/flasher", "/obj/machinery/keycard_auth",
-	"/obj/structure/mirror", "/obj/structure/closet/fireaxecabinet", "/obj/machinery/computer/security/telescreen/entertainment"
+	/obj/machinery/power/apc, /obj/machinery/alarm, /obj/item/device/radio/intercom,
+	/obj/structure/extinguisher_cabinet, /obj/structure/reagent_dispensers/peppertank,
+	/obj/machinery/status_display, /obj/machinery/requests_console, /obj/machinery/light_switch, /obj/structure/sign,
+	/obj/machinery/newscaster, /obj/machinery/firealarm, /obj/structure/noticeboard, /obj/machinery/door_control,
+	/obj/machinery/computer/security/telescreen, /obj/machinery/embedded_controller/radio/simple_vent_controller,
+	/obj/item/weapon/storage/secure/safe, /obj/machinery/door_timer, /obj/machinery/flasher, /obj/machinery/keycard_auth,
+	/obj/structure/mirror, /obj/structure/closet/fireaxecabinet, /obj/machinery/computer/security/telescreen/entertainment
 	)
 /proc/gotwallitem(loc, dir)
+	var/locdir = get_step(loc, dir)
 	for(var/obj/O in loc)
-		for(var/item in WALLITEMS)
-			if(istype(O, text2path(item)))
-				//Direction works sometimes
-				if(O.dir == dir)
-					return 1
-
-				//Some stuff doesn't use dir properly, so we need to check pixel instead
-				switch(dir)
-					if(SOUTH)
-						if(O.pixel_y > 10)
-							return 1
-					if(NORTH)
-						if(O.pixel_y < -10)
-							return 1
-					if(WEST)
-						if(O.pixel_x > 10)
-							return 1
-					if(EAST)
-						if(O.pixel_x < -10)
-							return 1
+		if(is_type_in_list(O, WALLITEMS))
+			//Direction works sometimes
+			if(O.dir == dir)
+				return 1
 
+			//Some stuff doesn't use dir properly, so we need to check pixel instead
+			//That's exactly what get_wall_mounted_turf() does
+			if(get_wall_mounted_turf(O) == locdir)
+				return 1
 
 	//Some stuff is placed directly on the wallturf (signs)
-	for(var/obj/O in get_step(loc, dir))
-		for(var/item in WALLITEMS)
-			if(istype(O, text2path(item)))
-				if(O.pixel_x == 0 && O.pixel_y == 0)
-					return 1
+	for(var/obj/O in locdir)
+		if(is_type_in_list(O, WALLITEMS))
+			if(O.pixel_x == 0 && O.pixel_y == 0)
+				return 1
 	return 0
 
 /proc/format_text(text)
@@ -1405,3 +1393,21 @@ var/list/WALLITEMS = list(
 			step(AM, pick(alldirs))
 		chance = max(chance - (initial_chance / steps), 0)
 		steps--
+
+/proc/get_wall_mounted_turf(atom/A)
+	/* This proc uses the pixel_x/y vars to guess the fake turf of a wall mounted atom.
+	Needless to say, this is an error prone method and possibly open to exploits.
+	It is however faster than using icon procs to get a more accurate reading.
+	I've only tested this proc on APCs. Use it with care.*/
+	if(is_type_in_list(A, WALLITEMS))
+		var/stepdir = 0
+	
+		if(A.pixel_x > 10) stepdir |= EAST
+		if(A.pixel_x < -10) stepdir |= WEST
+		if(A.pixel_y > 10) stepdir |= NORTH
+		if(A.pixel_y < -10) stepdir |= SOUTH
+	
+		if(stepdir)
+			return get_step(A, stepdir)
+	return get_turf(A)
+
diff --git a/code/game/machinery/machinery.dm b/code/game/machinery/machinery.dm
index 857008e4edf..c6828169bd7 100644
--- a/code/game/machinery/machinery.dm
+++ b/code/game/machinery/machinery.dm
@@ -242,7 +242,8 @@ Class Procs:
 		return
 	//stop AIs from leaving windows open and using then after they lose vision
 	//apc_override is needed here because AIs use their own APC when powerless
-	if(cameranet && !cameranet.checkTurfVis(get_turf(M)) && !apc_override)
+	//the snowflake get_wall_mounted_turf() is because APCs in maint aren't actually in view of the inner camera
+	if(cameranet && !cameranet.checkTurfVis(get_wall_mounted_turf(M)) && !apc_override)
 		return
 	return 1