diff --git a/code/game/turfs/simulated/outdoors/outdoors_ch.dm b/code/game/turfs/simulated/outdoors/outdoors_ch.dm
index b37b0fb378..a1ff63c16b 100644
--- a/code/game/turfs/simulated/outdoors/outdoors_ch.dm
+++ b/code/game/turfs/simulated/outdoors/outdoors_ch.dm
@@ -18,7 +18,7 @@
 	if(!demote_to)
 		return // Cannot demote further.
 
-	ChangeTurf(demote_to)
+	ChangeTurf(demote_to, preserve_outdoors = TRUE)
 
 /turf/simulated/floor/outdoors/grass
 	demote_to = /turf/simulated/floor/outdoors/dirt