diff --git a/aiohttp/web_urldispatcher.py b/aiohttp/web_urldispatcher.py
index 7b288fede24..336cac748d0 100644
--- a/aiohttp/web_urldispatcher.py
+++ b/aiohttp/web_urldispatcher.py
@@ -59,7 +59,7 @@ def get_info(self):
 
     @staticmethod
     def _append_query(url, query):
-        if query is not None:
+        if query:
             return url + "?" + urlencode(query)
         else:
             return url
diff --git a/tests/test_client_request.py b/tests/test_client_request.py
index b413570a873..c68d3b0ba21 100644
--- a/tests/test_client_request.py
+++ b/tests/test_client_request.py
@@ -405,6 +405,15 @@ def test_params_update_path_and_url(make_request):
     assert req.url == 'http://python.org/?test=foo&test=baz'
 
 
+def test_params_empty_path_and_url(make_request):
+    req_empty = make_request('get', 'http://python.org', params={})
+    assert req_empty.path == '/'
+    assert req_empty.url == 'http://python.org/'
+    req_none = make_request('get', 'http://python.org')
+    assert req_none.path == '/'
+    assert req_none.url == 'http://python.org/'
+
+
 def test_gen_netloc_all(make_request):
     req = make_request('get',
                        'https://aiohttp:pwpwpw@' +