diff --git a/sphinx/application.py b/sphinx/application.py
index bec79b7ffb..c60f12e96f 100644
--- a/sphinx/application.py
+++ b/sphinx/application.py
@@ -523,7 +523,7 @@ class Sphinx:
         self.registry.add_translator(name, translator_class, override=override)
 
     def add_node(self, node, override=False, **kwds):
-        # type: (nodes.Node, bool, Any) -> None
+        # type: (Type[nodes.Node], bool, Any) -> None
         """Register a Docutils node class.
 
         This is necessary for Docutils internals.  It may also be used in the
@@ -562,7 +562,7 @@ class Sphinx:
         self.registry.add_translation_handlers(node, **kwds)
 
     def add_enumerable_node(self, node, figtype, title_getter=None, override=False, **kwds):
-        # type: (nodes.Node, unicode, TitleGetter, bool, Any) -> None
+        # type: (Type[nodes.Element], unicode, TitleGetter, bool, Any) -> None
         """Register a Docutils node class as a numfig target.
 
         Sphinx numbers the node automatically. And then the users can refer it
@@ -591,7 +591,7 @@ class Sphinx:
 
     @property
     def enumerable_nodes(self):
-        # type: () -> Dict[nodes.Node, Tuple[unicode, TitleGetter]]
+        # type: () -> Dict[Type[nodes.Element], Tuple[unicode, TitleGetter]]
         warnings.warn('app.enumerable_nodes() is deprecated. '
                       'Use app.get_domain("std").enumerable_nodes instead.',
                       RemovedInSphinx30Warning, stacklevel=2)
diff --git a/sphinx/domains/__init__.py b/sphinx/domains/__init__.py
index a221c783d9..01d6a9d2d2 100644
--- a/sphinx/domains/__init__.py
+++ b/sphinx/domains/__init__.py
@@ -159,7 +159,7 @@ class Domain:
     #: role name -> a warning message if reference is missing
     dangling_warnings = {}  # type: Dict[unicode, unicode]
     #: node_class -> (enum_node_type, title_getter)
-    enumerable_nodes = {}   # type: Dict[Type[nodes.Node], Tuple[unicode, Callable]]
+    enumerable_nodes = {}   # type: Dict[Type[nodes.Element], Tuple[unicode, Callable]]
 
     #: data value for a fresh environment
     initial_data = {}       # type: Dict
diff --git a/sphinx/registry.py b/sphinx/registry.py
index 03bdb885e9..1ffece84cb 100644
--- a/sphinx/registry.py
+++ b/sphinx/registry.py
@@ -90,7 +90,7 @@ class SphinxComponentRegistry:
 
         #: additional enumerable nodes
         #: a dict of node class -> tuple of figtype and title_getter function
-        self.enumerable_nodes = {}      # type: Dict[nodes.Node, Tuple[unicode, TitleGetter]]
+        self.enumerable_nodes = {}      # type: Dict[Type[nodes.Element], Tuple[unicode, TitleGetter]]  # NOQA
 
         #: HTML inline and block math renderers
         #: a dict of name -> tuple of visit function and depart function
@@ -438,7 +438,7 @@ class SphinxComponentRegistry:
         self.latex_packages.append((name, options))
 
     def add_enumerable_node(self, node, figtype, title_getter=None, override=False):
-        # type: (nodes.Node, unicode, TitleGetter, bool) -> None
+        # type: (Type[nodes.Element], unicode, TitleGetter, bool) -> None
         logger.debug('[app] adding enumerable node: (%r, %r, %r)', node, figtype, title_getter)
         if node in self.enumerable_nodes and not override:
             raise ExtensionError(__('enumerable_node %r already registered') % node)
diff --git a/sphinx/util/docutils.py b/sphinx/util/docutils.py
index 334465213c..8d94ccebc1 100644
--- a/sphinx/util/docutils.py
+++ b/sphinx/util/docutils.py
@@ -36,7 +36,7 @@ report_re = re.compile('^(.+?:(?:\\d+)?): \\((DEBUG|INFO|WARNING|ERROR|SEVERE)/(
 
 if False:
     # For type annotation
-    from typing import Any, Callable, Generator, List, Set, Tuple  # NOQA
+    from typing import Any, Callable, Generator, List, Set, Tuple, Type  # NOQA
     from docutils.statemachine import State, ViewList  # NOQA
     from sphinx.config import Config  # NOQA
     from sphinx.environment import BuildEnvironment  # NOQA
@@ -66,13 +66,13 @@ def docutils_namespace():
 
 
 def is_node_registered(node):
-    # type: (nodes.Node) -> bool
+    # type: (Type[nodes.Element]) -> bool
     """Check the *node* is already registered."""
     return hasattr(nodes.GenericNodeVisitor, 'visit_' + node.__name__)
 
 
 def register_node(node):
-    # type: (nodes.Node) -> None
+    # type: (Type[nodes.Element]) -> None
     """Register a node to docutils.
 
     This modifies global state of some visitors.  So it is better to use this
@@ -84,7 +84,7 @@ def register_node(node):
 
 
 def unregister_node(node):
-    # type: (nodes.Node) -> None
+    # type: (Type[nodes.Element]) -> None
     """Unregister a node from docutils.
 
     This is inverse of ``nodes._add_nodes_class_names()``.