diff --git a/doc/changelog.rst b/doc/changelog.rst
index 1d2ab9e47..efca0164d 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -10,6 +10,7 @@ Version 3.5.1 fixes bugs reported since the release of 3.5.0:
 - :meth:`pymongo.command_cursor.CommandCursor.close` now closes
   the cursor synchronously instead of deferring to a background
   thread.
+- Fix documentation build warnings with Sphinx 1.6.x.
 
 Issues Resolved
 ...............
diff --git a/doc/mongo_extensions.py b/doc/mongo_extensions.py
index 6457c2719..b86b2f76f 100644
--- a/doc/mongo_extensions.py
+++ b/doc/mongo_extensions.py
@@ -15,8 +15,8 @@
 """MongoDB specific extensions to Sphinx."""
 
 from docutils import nodes
+from docutils.parsers import rst
 from sphinx import addnodes
-from sphinx.util.compat import Directive
 
 
 class mongodoc(nodes.Admonition, nodes.Element):
@@ -48,7 +48,7 @@ def depart_mongoref_node(self, node):
         self.body.append('\n')
 
 
-class MongodocDirective(Directive):
+class MongodocDirective(rst.Directive):
 
     has_content = True
     required_arguments = 0