diff --git a/packages/mercurius-codegen/src/mercuriusLoaders.ts b/packages/mercurius-codegen/src/mercuriusLoaders.ts
index 88292840..8af5d32f 100644
--- a/packages/mercurius-codegen/src/mercuriusLoaders.ts
+++ b/packages/mercurius-codegen/src/mercuriusLoaders.ts
@@ -124,7 +124,14 @@ export const MercuriusLoadersPlugin: CodegenPlugin<MercuriusLoadersPluginConfig>
         if (type instanceof GraphQLObjectType) {
           const fields = type.getFields()
 
-          const typeCode: Record<string, string> = {}
+          const typeCode: Record<string, string> = {
+            __resolveReference: `LoaderResolver<${namespacedImportPrefix}${
+              config.loadersCustomParentTypes?.[type.name] || type.name
+            },${namespacedImportPrefix}${
+              config.loadersCustomParentTypes?.[type.name] || type.name
+            },{}, TContext>`,
+          }
+
           Object.entries(fields).forEach(([key, value]) => {
             const tsType = fieldToType(value)
 
diff --git a/packages/mercurius-codegen/test/generated.ts b/packages/mercurius-codegen/test/generated.ts
index 76b20080..81ec3619 100644
--- a/packages/mercurius-codegen/test/generated.ts
+++ b/packages/mercurius-codegen/test/generated.ts
@@ -306,6 +306,7 @@ export interface Loaders<
   }
 > {
   Human?: {
+    __resolveReference?: LoaderResolver<Human, Human, {}, TContext>
     name?: LoaderResolver<Scalars['String'], Human, {}, TContext>
     father?: LoaderResolver<Maybe<Human>, Human, {}, TContext>
     hasSon?: LoaderResolver<
@@ -342,6 +343,7 @@ export interface Loaders<
   }
 
   NArray?: {
+    __resolveReference?: LoaderResolver<NArray, NArray, {}, TContext>
     nArray?: LoaderResolver<
       Maybe<Array<Maybe<Array<Maybe<Scalars['Int']>>>>>,
       NArray,
diff --git a/packages/mercurius-codegen/test/snapshots/index.test.ts.md b/packages/mercurius-codegen/test/snapshots/index.test.ts.md
index ab95178d..0f837693 100644
--- a/packages/mercurius-codegen/test/snapshots/index.test.ts.md
+++ b/packages/mercurius-codegen/test/snapshots/index.test.ts.md
@@ -27,11 +27,11 @@ Generated by [AVA](https://avajs.dev).
         }␊
         export interface Loaders<TContext = import("mercurius").MercuriusContext & { reply: import("fastify").FastifyReply }> {␊
           Human?: {␊
-            name?: LoaderResolver<Scalars["String"],TP_Types.Human,{}, TContext>;father?: LoaderResolver<Maybe<Human>,TP_Types.Human,{}, TContext>;hasSon?: LoaderResolver<Maybe<Scalars["Boolean"]>,TP_Types.Human,TP_Types.HumanhasSonArgs, TContext>;sons?: LoaderResolver<Array<Maybe<Human>>,TP_Types.Human,TP_Types.HumansonsArgs, TContext>;confirmedSonsNullable?: LoaderResolver<Maybe<Array<Human>>,TP_Types.Human,TP_Types.HumanconfirmedSonsNullableArgs, TContext>;confirmedSonsNonNullItems?: LoaderResolver<Array<Human>,TP_Types.Human,TP_Types.HumanconfirmedSonsNonNullItemsArgs, TContext>;sonNames?: LoaderResolver<Maybe<Array<Maybe<Scalars["String"]>>>,TP_Types.Human,{}, TContext>;nonNullssonNames?: LoaderResolver<Array<Scalars["String"]>,TP_Types.Human,{}, TContext>;␊
+            __resolveReference?: LoaderResolver<TP_Types.Human,TP_Types.Human,{}, TContext>;name?: LoaderResolver<Scalars["String"],TP_Types.Human,{}, TContext>;father?: LoaderResolver<Maybe<Human>,TP_Types.Human,{}, TContext>;hasSon?: LoaderResolver<Maybe<Scalars["Boolean"]>,TP_Types.Human,TP_Types.HumanhasSonArgs, TContext>;sons?: LoaderResolver<Array<Maybe<Human>>,TP_Types.Human,TP_Types.HumansonsArgs, TContext>;confirmedSonsNullable?: LoaderResolver<Maybe<Array<Human>>,TP_Types.Human,TP_Types.HumanconfirmedSonsNullableArgs, TContext>;confirmedSonsNonNullItems?: LoaderResolver<Array<Human>,TP_Types.Human,TP_Types.HumanconfirmedSonsNonNullItemsArgs, TContext>;sonNames?: LoaderResolver<Maybe<Array<Maybe<Scalars["String"]>>>,TP_Types.Human,{}, TContext>;nonNullssonNames?: LoaderResolver<Array<Scalars["String"]>,TP_Types.Human,{}, TContext>;␊
           };␊
             ␊
           NArray?: {␊
-            nArray?: LoaderResolver<Maybe<Array<Maybe<Array<Maybe<Scalars["Int"]>>>>>,TP_Types.NArray,{}, TContext>;␊
+            __resolveReference?: LoaderResolver<TP_Types.NArray,TP_Types.NArray,{}, TContext>;nArray?: LoaderResolver<Maybe<Array<Maybe<Array<Maybe<Scalars["Int"]>>>>>,TP_Types.NArray,{}, TContext>;␊
           };␊
             }`
 
@@ -346,6 +346,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     > {␊
       Human?: {␊
+        __resolveReference?: LoaderResolver<Human, Human, {}, TContext>␊
         name?: LoaderResolver<Scalars['String'], Human, {}, TContext>␊
         father?: LoaderResolver<Maybe<Human>, Human, {}, TContext>␊
         hasSon?: LoaderResolver<␊
@@ -382,6 +383,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     ␊
       NArray?: {␊
+        __resolveReference?: LoaderResolver<NArray, NArray, {}, TContext>␊
         nArray?: LoaderResolver<␊
           Maybe<Array<Maybe<Array<Maybe<Scalars['Int']>>>>>,␊
           NArray,␊
@@ -399,7 +401,7 @@ Generated by [AVA](https://avajs.dev).
 
 ## supports addUnderscoreToArgsType config option
 
-> addUnderscoreToArgsType code
+> generated code
 
     `import type {␊
       GraphQLResolveInfo,␊
@@ -708,6 +710,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     > {␊
       Human?: {␊
+        __resolveReference?: LoaderResolver<Human, Human, {}, TContext>␊
         name?: LoaderResolver<Scalars['String'], Human, {}, TContext>␊
         father?: LoaderResolver<Maybe<Human>, Human, {}, TContext>␊
         hasSon?: LoaderResolver<␊
@@ -744,6 +747,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     ␊
       NArray?: {␊
+        __resolveReference?: LoaderResolver<NArray, NArray, {}, TContext>␊
         nArray?: LoaderResolver<␊
           Maybe<Array<Maybe<Array<Maybe<Scalars['Int']>>>>>,␊
           NArray,␊
@@ -1089,6 +1093,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     > {␊
       Human?: {␊
+        __resolveReference?: LoaderResolver<Human, Human, {}, TContext>␊
         name?: LoaderResolver<Scalars['String'], Human, {}, TContext>␊
         father?: LoaderResolver<Maybe<Human>, Human, {}, TContext>␊
         hasSon?: LoaderResolver<␊
@@ -1125,6 +1130,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     ␊
       NArray?: {␊
+        __resolveReference?: LoaderResolver<NArray, NArray, {}, TContext>␊
         nArray?: LoaderResolver<␊
           Maybe<Array<Maybe<Array<Maybe<Scalars['Int']>>>>>,␊
           NArray,␊
@@ -1468,6 +1474,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     > {␊
       Human?: {␊
+        __resolveReference?: LoaderResolver<Human, Human, {}, TContext>␊
         name?: LoaderResolver<Scalars['String'], Human, {}, TContext>␊
         father?: LoaderResolver<Maybe<Human>, Human, {}, TContext>␊
         hasSon?: LoaderResolver<␊
@@ -1504,6 +1511,7 @@ Generated by [AVA](https://avajs.dev).
       }␊
     ␊
       NArray?: {␊
+        __resolveReference?: LoaderResolver<NArray, NArray, {}, TContext>␊
         nArray?: LoaderResolver<␊
           Maybe<Array<Maybe<Array<Maybe<Scalars['Int']>>>>>,␊
           NArray,␊
diff --git a/packages/mercurius-codegen/test/snapshots/index.test.ts.snap b/packages/mercurius-codegen/test/snapshots/index.test.ts.snap
index 9579a81c..163b0458 100644
Binary files a/packages/mercurius-codegen/test/snapshots/index.test.ts.snap and b/packages/mercurius-codegen/test/snapshots/index.test.ts.snap differ