diff --git a/code/modules/mapping/preloader.dm b/code/modules/mapping/preloader.dm
index 4b61663f668..6fb1e4cdb64 100644
--- a/code/modules/mapping/preloader.dm
+++ b/code/modules/mapping/preloader.dm
@@ -4,7 +4,6 @@ GLOBAL_DATUM_INIT(_preloader, /datum/map_preloader, new)
 
 /// Preloader datum
 /datum/map_preloader
-	parent_type = /datum
 	var/list/attributes
 	var/target_path