diff -r 5621e9a21cc3 Lib/asyncio/coroutines.py
--- a/Lib/asyncio/coroutines.py	Sat May 30 13:54:52 2015 -0400
+++ b/Lib/asyncio/coroutines.py	Sat May 30 16:00:16 2015 -0400
@@ -54,9 +54,11 @@
                                          inspect.CO_COROUTINE)
 
 try:
-    from collections.abc import Coroutine as CoroutineABC
+    from collections.abc import Coroutine as CoroutineABC, \
+                                Awaitable as AwaitableABC
 except ImportError:
     CoroutineABC = None
+    AwaitableABC = None
 
 
 # Check for CPython issue #21209
@@ -192,6 +194,16 @@
             res = func(*args, **kw)
             if isinstance(res, futures.Future) or inspect.isgenerator(res):
                 res = yield from res
+            elif AwaitableABC is not None:
+                # If 'func' returns an Awaitable (new in 3.5) we
+                # want to run it.
+                try:
+                    await_meth = res.__await__
+                except AttributeError:
+                    pass
+                else:
+                    if isinstance(res, AwaitableABC):
+                        res = yield from await_meth()
             return res
 
     if not _DEBUG:
diff -r 5621e9a21cc3 Lib/test/test_asyncio/test_pep492.py
--- a/Lib/test/test_asyncio/test_pep492.py	Sat May 30 13:54:52 2015 -0400
+++ b/Lib/test/test_asyncio/test_pep492.py	Sat May 30 16:00:16 2015 -0400
@@ -106,6 +106,19 @@
 
         self.assertTrue(asyncio.iscoroutine(FakeCoro()))
 
+    def test_function_returning_awaitable(self):
+        class Awaitable:
+            def __await__(self):
+                return ('spam',)
+
+        @asyncio.coroutine
+        def func():
+            return Awaitable()
+
+        coro = func()
+        self.assertEquals(coro.send(None), 'spam')
+        coro.close()
+
 
 if __name__ == '__main__':
     unittest.main()