diff --git a/code/game/turfs/change_turf.dm b/code/game/turfs/change_turf.dm
index 2c2d5712b46..513bdc3d0b2 100644
--- a/code/game/turfs/change_turf.dm
+++ b/code/game/turfs/change_turf.dm
@@ -96,6 +96,8 @@ GLOBAL_LIST_INIT(blacklisted_automated_baseturfs, typecacheof(list(
 
 	var/list/old_baseturfs = baseturfs
 	var/old_type = type
+	var/datum/weakref/old_ref = weak_reference
+	weak_reference = null
 
 	var/list/post_change_callbacks = list()
 	SEND_SIGNAL(src, COMSIG_TURF_CHANGE, path, new_baseturfs, flags, post_change_callbacks)
@@ -142,6 +144,8 @@ GLOBAL_LIST_INIT(blacklisted_automated_baseturfs, typecacheof(list(
 
 	lattice_underneath = old_lattice_underneath
 
+	new_turf.weak_reference = old_ref
+
 	if(SSlighting.initialized)
 		// Space tiles should never have lighting objects
 		if(!space_lit)
diff --git a/code/modules/projectiles/projectile.dm b/code/modules/projectiles/projectile.dm
index 6a699f414b3..b32d58b8dd1 100644
--- a/code/modules/projectiles/projectile.dm
+++ b/code/modules/projectiles/projectile.dm
@@ -1205,7 +1205,6 @@
 	var/turf/startloc = get_turf(src)
 	var/obj/projectile/bullet = new projectile_type(startloc)
 	bullet.starting = startloc
-	var/list/ignore = list()
 	for (var/atom/thing as anything in ignore_targets)
 		bullet.impacted[WEAKREF(thing)] = TRUE
 	bullet.firer = firer || src