diff --git a/packages/plugin-dataloader/src/schema-builder.ts b/packages/plugin-dataloader/src/schema-builder.ts
index e8c279cc7..6246ce15a 100644
--- a/packages/plugin-dataloader/src/schema-builder.ts
+++ b/packages/plugin-dataloader/src/schema-builder.ts
@@ -1,6 +1,8 @@
+import type { GraphQLResolveInfo } from 'graphql';
 import SchemaBuilder, {
   InterfaceParam,
   ObjectParam,
+  OutputRef,
   PothosSchemaError,
   SchemaTypes,
   ShapeFromTypeParam,
@@ -159,7 +161,37 @@ schemaBuilderProto.loadableNode = function loadableNode<
     options,
   );
 
-  ref.implement(options);
+  // ref.implement(options);
+  ref.implement({
+    ...options,
+    isTypeOf:
+      options.isTypeOf ??
+      (typeof nameOrRef === 'function'
+        ? (maybeNode: unknown, context: object, info: GraphQLResolveInfo) => {
+            if (!maybeNode) {
+              return false;
+            }
+
+            if (maybeNode instanceof (nameOrRef as Function)) {
+              return true;
+            }
+
+            const proto = Object.getPrototypeOf(maybeNode) as { constructor: unknown };
+
+            try {
+              if (proto?.constructor) {
+                const config = this.configStore.getTypeConfig(proto.constructor as OutputRef);
+
+                return config.name === name;
+              }
+            } catch {
+              // ignore
+            }
+
+            return false;
+          }
+        : undefined),
+  });
 
   if (typeof nameOrRef !== 'string') {
     this.configStore.associateRefWithName(nameOrRef, name);
diff --git a/packages/plugin-dataloader/tests/__snapshots__/index.test.ts.snap b/packages/plugin-dataloader/tests/__snapshots__/index.test.ts.snap
index c2c45283f..613042543 100644
--- a/packages/plugin-dataloader/tests/__snapshots__/index.test.ts.snap
+++ b/packages/plugin-dataloader/tests/__snapshots__/index.test.ts.snap
@@ -319,8 +319,12 @@ exports[`dataloader > queries > valid queries 1`] = `
     "classThing": {
       "id": "Q2xhc3NMb2FkYWJsZVRoaW5nOjEyMw==",
     },
+    "classThingNode": {
+      "__typename": "ClassLoadableThing",
+      "id": "Q2xhc3NMb2FkYWJsZVRoaW5nOjE=",
+    },
     "classThingRef": {
-      "id": "Q2xhc3NMb2FkYWJsZVRoaW5nOjEyMw==",
+      "id": "Q2xhc3NMb2FkYWJsZVRoaW5nOjE=",
     },
     "counts": [
       {
diff --git a/packages/plugin-dataloader/tests/example/schema/nodes.ts b/packages/plugin-dataloader/tests/example/schema/nodes.ts
index b842e230c..a2a2374d5 100644
--- a/packages/plugin-dataloader/tests/example/schema/nodes.ts
+++ b/packages/plugin-dataloader/tests/example/schema/nodes.ts
@@ -11,21 +11,25 @@ const UserNode = builder.loadableNodeRef('UserNode', {
   load: (keys: string[], context: ContextType) => {
     countCall(context, userNodeCounts, keys.length);
     return Promise.resolve(
-      keys.map((id) => (Number(id) > 0 ? { id: Number(id) } : new Error(`Invalid ID ${id}`))),
+      keys.map((id) =>
+        Number(id) > 0 ? { objType: 'UserNode', id: Number(id) } : new Error(`Invalid ID ${id}`),
+      ),
     );
   },
 });
 
 builder.objectType(UserNode, {
   interfaces: [TestInterface],
-  isTypeOf: (obj) =>
-    typeof obj === 'object' && obj !== null && Object.prototype.hasOwnProperty.call(obj, 'id'),
+  isTypeOf: (obj) => (obj as any).objType === 'UserNode',
   fields: (t) => ({}),
 });
 
 class ClassThing {
-  id: number = 123;
+  id: number;
   name: string = 'some name';
+  constructor(id = 123) {
+    this.id = id;
+  }
 }
 
 const ClassThingRef = builder.loadableNode(ClassThing, {
@@ -36,7 +40,8 @@ const ClassThingRef = builder.loadableNode(ClassThing, {
   },
   loaderOptions: { maxBatchSize: 20 },
   // eslint-disable-next-line @typescript-eslint/require-await
-  load: async (keys: string[], context: ContextType) => [new ClassThing()],
+  load: async (keys: string[], context: ContextType) =>
+    keys.map((k) => new ClassThing(Number.parseInt(k, 10))),
   fields: (t) => ({}),
 });
 
diff --git a/packages/plugin-dataloader/tests/index.test.ts b/packages/plugin-dataloader/tests/index.test.ts
index 68edc06cb..a0ccb6ea7 100644
--- a/packages/plugin-dataloader/tests/index.test.ts
+++ b/packages/plugin-dataloader/tests/index.test.ts
@@ -158,6 +158,10 @@ describe('dataloader', () => {
           threeToMany: oneToMany(id: 3) {
             id
           }
+          classThingNode: node(id: "Q2xhc3NMb2FkYWJsZVRoaW5nOjE=") {
+            __typename
+            id
+          }
         }
       `;