diff --git a/code/game/turfs/turf_changing.dm b/code/game/turfs/turf_changing.dm
index 755cda00de5..8375496cce5 100644
--- a/code/game/turfs/turf_changing.dm
+++ b/code/game/turfs/turf_changing.dm
@@ -146,16 +146,17 @@
 
 	propogate_sunlight_changes(oldtype, old_density, W)
 	var/turf/simulated/cur_turf = src
-	if(istype(cur_turf) && is_open != was_open)
-		do
-			cur_turf = GetBelow(cur_turf)
-			var/area/A = cur_turf.loc
-			if(is_open && !A.isAlwaysIndoors())
-				cur_turf.make_outdoors()
-			else
-				cur_turf.make_indoors()
-			cur_turf.propogate_sunlight_changes(oldtype, old_density, W, above = TRUE)
-		while(istype(cur_turf,/turf/simulated/open) && HasBelow(cur_turf.z))
+	if(istype(cur_turf))
+		if(is_open != was_open)
+			do
+				cur_turf = GetBelow(cur_turf)
+				var/area/A = cur_turf.loc
+				if(is_open && !A.isAlwaysIndoors())
+					cur_turf.make_outdoors()
+				else
+					cur_turf.make_indoors()
+				cur_turf.propogate_sunlight_changes(oldtype, old_density, W, above = TRUE)
+			while(istype(cur_turf,/turf/simulated/open) && HasBelow(cur_turf.z))
 
 	if(old_shandler) old_shandler.holder_change()
 	if(preserve_outdoors)