diff --git a/code/__HELPERS/_lists.dm b/code/__HELPERS/_lists.dm
index d63c10c508..393c5a465d 100644
--- a/code/__HELPERS/_lists.dm
+++ b/code/__HELPERS/_lists.dm
@@ -89,11 +89,13 @@
 	return
 
 //returns a new list with only atoms that are in typecache L
-/proc/typecache_filter_list(list/atoms, list/typecache)
+/proc/typecache_filter_list(list/atoms, list/typecache, reversed=FALSE)
 	. = list()
 	for (var/thing in atoms)
 		var/atom/A = thing
-		if (typecache[A.type])
+		if (typecache[A.type] && !reversed)
+			. += A
+		else if(reversed)
 			. += A
 
 //Like typesof() or subtypesof(), but returns a typecache instead of a list
diff --git a/code/game/turfs/turf.dm b/code/game/turfs/turf.dm
index a2b548e2b5..01e846632c 100644
--- a/code/game/turfs/turf.dm
+++ b/code/game/turfs/turf.dm
@@ -411,7 +411,7 @@
 	// Remove all atoms except observers, landmarks, docking ports
 	var/turf/T0 = src
 	var/static/list/ignored_atoms = typecacheof(list(/mob/dead, /obj/effect/landmark, /obj/docking_port, /atom/movable/lighting_object))
-	var/list/allowed_contents = typecache_filter_list(T0.GetAllContents(),ignored_atoms)
+	var/list/allowed_contents = typecache_filter_list(T0.GetAllContents(),ignored_atoms,reversed=TRUE)
 	for(var/i in 1 to allowed_contents.len)
 		var/thing = allowed_contents[i]
 		qdel(thing, force=TRUE)