diff --git a/jedi/inference/gradual/stub_value.py b/jedi/inference/gradual/stub_value.py
index c2e2bc4e..22f08a10 100644
--- a/jedi/inference/gradual/stub_value.py
+++ b/jedi/inference/gradual/stub_value.py
@@ -86,6 +86,8 @@ class StubFilter(ParserTreeFilter):
         # Imports in stub files are only public if they have an "as"
         # export.
         definition = name.get_definition()
+        if definition is None:
+            return False
         if definition.type in ('import_from', 'import_name'):
             if name.parent.type not in ('import_as_name', 'dotted_as_name'):
                 return False
diff --git a/jedi/inference/value/klass.py b/jedi/inference/value/klass.py
index ee8d4e85..6ff1698c 100644
--- a/jedi/inference/value/klass.py
+++ b/jedi/inference/value/klass.py
@@ -78,6 +78,8 @@ class ClassName(TreeNameDefinition):
         type_ = super().api_type
         if type_ == 'function':
             definition = self.tree_name.get_definition()
+            if definition is None:
+                return type_
             if function_is_property(definition):
                 # This essentially checks if there is an @property before
                 # the function. @property could be something different, but