diff --git a/IPA.Loader/Config/Stores/GeneratedStoreImpl/MakeCreator.cs b/IPA.Loader/Config/Stores/GeneratedStoreImpl/MakeCreator.cs
index 3b584f15..9ded5ca5 100644
--- a/IPA.Loader/Config/Stores/GeneratedStoreImpl/MakeCreator.cs
+++ b/IPA.Loader/Config/Stores/GeneratedStoreImpl/MakeCreator.cs
@@ -368,7 +368,7 @@ namespace IPA.Config.Stores
 
                 foreach (var member in structure)
                 {
-                    EmitSerializeMember(il, member, GetLocal);
+                    EmitSerializeMember(il, member, GetLocal, GetMethodThis);
                     il.Emit(OpCodes.Stloc, valLocal);
                     il.Emit(OpCodes.Ldloc, mapLocal);
                     il.Emit(OpCodes.Ldstr, member.Name);
diff --git a/IPA.Loader/Config/Stores/GeneratedStoreImpl/Serialization.cs b/IPA.Loader/Config/Stores/GeneratedStoreImpl/Serialization.cs
index 81bfb3b0..e8ac69dd 100644
--- a/IPA.Loader/Config/Stores/GeneratedStoreImpl/Serialization.cs
+++ b/IPA.Loader/Config/Stores/GeneratedStoreImpl/Serialization.cs
@@ -18,7 +18,7 @@ namespace IPA.Config.Stores
     internal static partial class GeneratedStoreImpl
     {
         // emit takes no args, leaves Value at top of stack
-        private static void EmitSerializeMember(ILGenerator il, SerializedMemberInfo member, GetLocal GetLocal, Action<ILGenerator> thisarg = null)
+        private static void EmitSerializeMember(ILGenerator il, SerializedMemberInfo member, GetLocal GetLocal, Action<ILGenerator> thisarg)
         {
             EmitLoad(il, member, thisarg);