diff --git a/jedi/inference/names.py b/jedi/inference/names.py
index f90f9749..3e17ecd8 100644
--- a/jedi/inference/names.py
+++ b/jedi/inference/names.py
@@ -341,6 +341,12 @@ class TreeNameDefinition(AbstractTreeName):
     def py__doc__(self):
         api_type = self.api_type
         if api_type in ('function', 'class', 'property'):
+            if self.parent_context.get_root_context().is_stub():
+                from jedi.inference.gradual.conversion import convert_names
+                names = convert_names([self], prefer_stub_to_compiled=False)
+                if self not in names:
+                    return _merge_name_docs(names)
+
             # Make sure the names are not TreeNameDefinitions anymore.
             return clean_scope_docstring(self.tree_name.get_definition())
 
diff --git a/test/test_api/test_documentation.py b/test/test_api/test_documentation.py
index b86c68fc..4c09d612 100644
--- a/test/test_api/test_documentation.py
+++ b/test/test_api/test_documentation.py
@@ -37,6 +37,17 @@ def test_operator_doc(Script):
     assert len(d.docstring()) > 100
 
 
+@pytest.mark.parametrize(
+    'code, help_part', [
+        ('str', 'Create a new string object'),
+        ('str.strip', 'Return a copy of the string'),
+    ]
+)
+def test_stdlib_doc(Script, code, help_part):
+    h, = Script(code).help()
+    assert help_part in h.docstring(raw=True)
+
+
 def test_lambda(Script):
     d, = Script('lambda x: x').help(column=0)
     assert d.type == 'keyword'