1 files changed, 1 insertions, 2 deletions
diff --git a/lib/modules.nix b/lib/modules.nix
index e9fc1007fc20..79d54e4a5387 100644
--- a/lib/modules.nix
+++ b/lib/modules.nix
@@ -151,8 +151,7 @@ rec {
           };
 
           _module.freeformType = mkOption {
-            # Disallow merging for now, but could be implemented nicely with a `types.optionType`
-            type = types.nullOr (types.uniq types.attrs);
+            type = types.nullOr types.optionType;
             internal = true;
             default = null;
             description = ''