diff --git a/create_vfs.gd b/create_vfs.gd
index 8a2103d..5a58800 100644
--- a/create_vfs.gd
+++ b/create_vfs.gd
@@ -17,8 +17,8 @@ static func create_meta_accessor(file_accessors:Array[VFileAccess])->VFileAccess
 		var accum:Array[String] = []
 		accum.assign(
 			file_accessors.reduce(
-				(func _merge_files(total:Array[String], current:VFileAccess)->Array[String]:
-					var res:Array[String] = total.duplicate()
+				(func _merge_files(total:Array, current:VFileAccess)->Array:
+					var res:Array = total.duplicate()
 					for file:String in current.get_files_at(path):
 						if not file in total:
 							res.append(file)
@@ -171,13 +171,13 @@ static func create_bulk_readonly_zip_access(
 	vfiler._get_files_at = func(path:String)->Array[String]:
 		if not path.ends_with("/"):		# TODO ensure no // as well because that can be problem.
 			path += "/"					# sorry for the mutation
-		var accum:Array[String] = []
+		var accum:Array = []
 		accum.assign(	readers.reduce(
-			(func _merge_files(total:Array[String], current:ZIPReader)->Array[String]:
-				var res:Array[String] = total.duplicate()
+			(func _merge_files(total:Array, current:ZIPReader)->Array:
+				var res:Array = total.duplicate()
 				var filtered:Array = []
 				filtered.assign(current.get_files())
-				filtered.filter(
+				filtered = filtered.filter(
 					func _filter_dir(curpath:String)->bool:
 						return curpath.begins_with(path))
 				for file:String in filtered:
@@ -186,6 +186,8 @@ static func create_bulk_readonly_zip_access(
 					if not file in total and not stripped_file.contains("/"):
 						res.append(file)
 				return res) ,[]))
-		return accum
+		var out_accum:Array[String] = []
+		out_accum.assign(accum)
+		return out_accum
 	
 	return vfiler