diff --git a/modules/tasks/filesystems.nix b/modules/tasks/filesystems.nix
index 3ee26bbfc779..22deacd1928b 100644
--- a/modules/tasks/filesystems.nix
+++ b/modules/tasks/filesystems.nix
@@ -50,8 +50,7 @@ in
         <command>mkdir -p</command> .
       ";
 
-      type = types.nullOr (types.loaOf types.optionSet);
-      apply = x: attrValues x;
+      type = types.nullOr (types.list types.optionSet);
 
       options = {