diff --git a/_maps/map_files/stations/emeraldstation.dmm b/_maps/map_files/stations/emeraldstation.dmm
index 1de73ac8b4af..71c1db5b2dee 100644
--- a/_maps/map_files/stations/emeraldstation.dmm
+++ b/_maps/map_files/stations/emeraldstation.dmm
@@ -22210,7 +22210,7 @@
 /turf/simulated/floor/carpet,
 /area/station/command/office/cmo)
 "ekg" = (
-/obj/structures/plasmageyser,
+/obj/structure/plasmageyser,
 /turf/simulated/floor/lava/plasma/fuming,
 /area/station/engineering/atmos/asteroid_core)
 "eki" = (
diff --git a/code/game/objects/structures/plasma_geyser.dm b/code/game/objects/structures/plasma_geyser.dm
index 381d4cc33064..9642cb38def4 100644
--- a/code/game/objects/structures/plasma_geyser.dm
+++ b/code/game/objects/structures/plasma_geyser.dm
@@ -1,5 +1,5 @@
 
-/obj/structures/plasmageyser
+/obj/structure/plasmageyser
 	name = "Plasma Geyser"
 	desc = "A mound of basalt rock, erupting with bubbling molten plasma. It constantly emits toxic fumes."
 	anchored = TRUE
@@ -8,22 +8,22 @@
 	resistance_flags = LAVA_PROOF | FIRE_PROOF
 	armor = list(MELEE = 30, BULLET = 80, LASER = 90, ENERGY = 90, BOMB = 80, RAD = 100, FIRE = 100, ACID = 100)
 
-/obj/structures/plasmageyser/Initialize(mapload)
+/obj/structure/plasmageyser/Initialize(mapload)
 	. = ..()
 	START_PROCESSING(SSprocessing, src)
 
 // for sanity checks
-/obj/structures/plasmageyser/Destroy()
+/obj/structure/plasmageyser/Destroy()
 	STOP_PROCESSING(SSprocessing, src)
 	return ..()
 
-/obj/structures/plasmageyser/process()
+/obj/structure/plasmageyser/process()
 	var/datum/milla_safe/plasmageyser/milla = new()
 	milla.invoke_async(src)
 
 /datum/milla_safe/plasmageyser
 
-/datum/milla_safe/plasmageyser/on_run(obj/structures/plasmageyser/geyser)
+/datum/milla_safe/plasmageyser/on_run(obj/structure/plasmageyser/geyser)
 	var/max_pressure = ONE_ATMOSPHERE * 3
 	var/toxins_modifier = 100
 	var/co2_modifier = 12
diff --git a/tools/UpdatePaths/Scripts/27339_structures.txt b/tools/UpdatePaths/Scripts/27339_structures.txt
new file mode 100644
index 000000000000..a09d383762fb
--- /dev/null
+++ b/tools/UpdatePaths/Scripts/27339_structures.txt
@@ -0,0 +1 @@
+/obj/structures/@SUBTYPES : /obj/structure/@SUBTYPES{@OLD}