diff --git a/sphinx/ext/autodoc.py b/sphinx/ext/autodoc.py
index 98783cfdbf4..148c09811fa 100644
--- a/sphinx/ext/autodoc.py
+++ b/sphinx/ext/autodoc.py
@@ -93,6 +93,9 @@ def __init__(self, *args, **kwargs):
         self.__all__ = []
 
     def __call__(self, *args, **kwargs):
+        if args and type(args[0]) in [FunctionType, MethodType]:
+            # Appears to be a decorator, pass through unchanged
+            return args[0]
         return _MockModule()
 
     def _append_submodule(self, submod):
diff --git a/tests/root/autodoc_missing_imports.py b/tests/root/autodoc_missing_imports.py
index 7a71734526e..0901ce8e253 100644
--- a/tests/root/autodoc_missing_imports.py
+++ b/tests/root/autodoc_missing_imports.py
@@ -5,5 +5,14 @@
 from missing_package2 import missing_module2
 from missing_package3.missing_module3 import missing_name
 
+@missing_name
+def decoratedFunction():
+  """decoratedFunction docstring"""
+  return None
+
 class TestAutodoc(object):
     """TestAutodoc docstring."""
+    @missing_name
+    def decoratedMethod(self):
+        """TestAutodoc::decoratedMethod docstring"""
+        return None
diff --git a/tests/test_autodoc.py b/tests/test_autodoc.py
index 68e15bbed64..2b5d80efbe2 100644
--- a/tests/test_autodoc.py
+++ b/tests/test_autodoc.py
@@ -853,6 +853,17 @@ def assert_order(items, objtype, name, member_order, **kw):
     assert_result_contains('   .. py:method:: CustomDataDescriptor.meth()',
                            'module', 'test_autodoc')
 
+    # test mocked module imports
+    options.members = ['TestAutodoc']
+    options.undoc_members = False
+    assert_result_contains('.. py:class:: TestAutodoc',
+                           'module', 'autodoc_missing_imports')
+    assert_result_contains('   .. py:method:: TestAutodoc.decoratedMethod()',
+                           'module', 'autodoc_missing_imports')
+    options.members = ['decoratedFunction']
+    assert_result_contains('.. py:function:: decoratedFunction()',
+                           'module', 'autodoc_missing_imports')
+
 # --- generate fodder ------------
 __all__ = ['Class']