diff --git a/aiohttp/web_reqrep.py b/aiohttp/web_reqrep.py
index 6f3e566c8c6..ea5965cf04e 100644
--- a/aiohttp/web_reqrep.py
+++ b/aiohttp/web_reqrep.py
@@ -24,7 +24,7 @@
                         CIMultiDict,
                         MultiDictProxy,
                         MultiDict)
-from .protocol import Response as ResponseImpl, HttpVersion10
+from .protocol import Response as ResponseImpl, HttpVersion10, HttpVersion11
 from .streams import EOF_MARKER
 
 
@@ -646,6 +646,10 @@ def start(self, request):
             self._start_compression(request)
 
         if self._chunked:
+            if request.version != HttpVersion11:
+                raise RuntimeError("Using chunked encoding is forbidden "
+                                   "for HTTP/{0.major}.{0.minor}".format(
+                                       request.version))
             resp_impl.enable_chunked_encoding()
             if self._chunk_size:
                 resp_impl.add_chunking_filter(self._chunk_size)
diff --git a/docs/web_reference.rst b/docs/web_reference.rst
index c8ecee09033..8c877b1ce9c 100644
--- a/docs/web_reference.rst
+++ b/docs/web_reference.rst
@@ -429,6 +429,11 @@ StreamResponse
 
       .. versionadded:: 0.14
 
+      .. warning:: chunked encoding can be enabled for ``HTTP/1.1`` only.
+
+                   Setting up both :attr:`content_length` and chunked
+                   encoding is mutually exclusive.
+
       .. seealso:: :attr:`chunked`
 
    .. attribute:: headers
diff --git a/tests/test_web_response.py b/tests/test_web_response.py
index abe1363ad48..e7f820d9a84 100644
--- a/tests/test_web_response.py
+++ b/tests/test_web_response.py
@@ -18,8 +18,9 @@ def setUp(self):
     def tearDown(self):
         self.loop.close()
 
-    def make_request(self, method, path, headers=CIMultiDict()):
-        message = RawRequestMessage(method, path, HttpVersion11, headers,
+    def make_request(self, method, path, headers=CIMultiDict(),
+                     version=HttpVersion11):
+        message = RawRequestMessage(method, path, version, headers,
                                     False, False)
         return self.request_from_message(message)
 
@@ -183,6 +184,16 @@ def test_chunk_size(self, ResponseImpl):
         msg.add_chunking_filter.assert_called_with(8192)
         self.assertIsNotNone(msg.filter)
 
+    def test_chunked_encoding_forbidden_for_http_10(self):
+        req = self.make_request('GET', '/', version=HttpVersion10)
+        resp = StreamResponse()
+        resp.enable_chunked_encoding()
+
+        with self.assertRaisesRegex(
+                RuntimeError,
+                "Using chunked encoding is forbidden for HTTP/1.0"):
+            resp.start(req)
+
     @mock.patch('aiohttp.web_reqrep.ResponseImpl')
     def test_compression_no_accept(self, ResponseImpl):
         req = self.make_request('GET', '/')