diff --git a/src/coredumpy/py_object_proxy.py b/src/coredumpy/py_object_proxy.py
index 7b45c40..d527643 100644
--- a/src/coredumpy/py_object_proxy.py
+++ b/src/coredumpy/py_object_proxy.py
@@ -83,7 +83,13 @@ def load_objects(cls, data):
 
     @classmethod
     def default_encode(cls, obj):
-        data = {"type": type(obj).__name__, "attrs": {}}
+        obj_type = type(obj)
+        if obj_type.__module__ in ("builtins", "__main__"):
+            typename = obj_type.__qualname__
+        else:
+            typename = f"{obj_type.__module__}.{obj_type.__qualname__}"
+
+        data = {"type": typename, "attrs": {}}
         if isinstance(obj, (types.ModuleType,
                             types.FunctionType,
                             types.BuiltinFunctionType,
diff --git a/tests/test_py_object_proxy.py b/tests/test_py_object_proxy.py
index b5b4010..20cd0c5 100644
--- a/tests/test_py_object_proxy.py
+++ b/tests/test_py_object_proxy.py
@@ -29,7 +29,7 @@ def __init__(self, x):
         proxy = self.convert_object(obj)
         self.assertEqual(proxy.x, 142857)
         self.assertEqual(dir(proxy), ['x'])
-        self.assertIn('<A object at 0x', repr(proxy))
+        self.assertIn('A object at 0x', repr(proxy))
 
     def test_tuple(self):
         obj = (1, 2, 3)
@@ -46,6 +46,11 @@ def test_bool(self):
         proxy = self.convert_object(obj)
         self.assertEqual(proxy, True)
 
+    def test_builtins(self):
+        obj = object()
+        proxy = self.convert_object(obj)
+        self.assertEqual(proxy._coredumpy_type, "object")
+
     def test_module(self):
         import os
         proxy = self.convert_object(os)