diff --git a/mods/ENTITIES/mcl_mobs/spawning.lua b/mods/ENTITIES/mcl_mobs/spawning.lua
index 7ccfdb499..14d497817 100644
--- a/mods/ENTITIES/mcl_mobs/spawning.lua
+++ b/mods/ENTITIES/mcl_mobs/spawning.lua
@@ -737,7 +737,7 @@ local function get_water_spawn(p)
 end
 
 local function has_room(self,pos)
-	local cb = self.collisionbox
+	local cb = self.spawnbox or self.collisionbox
 	local nodes = {}
 	if self.fly_in then
 		local t = type(self.fly_in)