diff --git a/maps/sierra/z1-z5_sierra.dmm b/maps/sierra/z1-z5_sierra.dmm
index 8488e1b697039..732ab49d600ec 100644
--- a/maps/sierra/z1-z5_sierra.dmm
+++ b/maps/sierra/z1-z5_sierra.dmm
@@ -22337,6 +22337,15 @@
 	},
 /turf/simulated/floor/tiled/dark,
 /area/vacant/mess)
+"dou" = (
+/obj/wallframe_spawn/reinforced,
+/obj/machinery/door/firedoor,
+/obj/machinery/door/blast/shutters/open{
+	id_tag = "chemistry_lockdown";
+	name = "Chemistry Shutters"
+	},
+/turf/simulated/floor/plating,
+/area/medical/chemistry)
 "doG" = (
 /obj/floor_decal/techfloor/orange{
 	dir = 1
@@ -44470,6 +44479,13 @@
 	d2 = 8;
 	icon_state = "1-8"
 	},
+/obj/machinery/button/blast_door{
+	id_tag = "chemistry_lockdown";
+	name = "Chemistry Shutters";
+	pixel_x = -26;
+	pixel_y = -24;
+	req_access = list("ACCESS_MEDICAL")
+	},
 /turf/simulated/floor/tiled/white,
 /area/medical/chemistry)
 "gEx" = (
@@ -61912,10 +61928,6 @@
 /turf/simulated/floor/tiled,
 /area/quartermaster/exploration/briefing_room)
 "jkL" = (
-/obj/machinery/door/airlock/medical{
-	dir = 4;
-	name = "Medical Storage"
-	},
 /obj/machinery/door/firedoor,
 /obj/machinery/atmospherics/pipe/simple/hidden/supply{
 	dir = 4
@@ -85303,6 +85315,10 @@
 /obj/item/pen,
 /obj/machinery/door/firedoor,
 /obj/structure/disposalpipe/segment,
+/obj/machinery/door/blast/shutters/open{
+	id_tag = "chemistry_lockdown";
+	name = "Chemistry Shutters"
+	},
 /turf/simulated/floor/plating,
 /area/medical/chemistry)
 "mLR" = (
@@ -306668,7 +306684,7 @@ cjp
 xjf
 tFi
 xHI
-cjp
+dou
 nSY
 vcA
 iZZ