diff --git a/service-mgmt-api/sm-api/sm_api/openstack/common/db/sqlalchemy/models.py b/service-mgmt-api/sm-api/sm_api/openstack/common/db/sqlalchemy/models.py
index 8cc0049e..b9444063 100644
--- a/service-mgmt-api/sm-api/sm_api/openstack/common/db/sqlalchemy/models.py
+++ b/service-mgmt-api/sm-api/sm_api/openstack/common/db/sqlalchemy/models.py
@@ -74,9 +74,12 @@ class ModelBase(object):
         return self
 
     def next(self):
-        n = self._i.next()
+        n = next(self._i)
         return n, getattr(self, n)
 
+    # In Python 3, __next__() has replaced next().
+    __next__ = next
+
     def update(self, values):
         """Make the model object behave like a dict."""
         for k, v in values.items():
diff --git a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/amqp.py b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/amqp.py
index 7ee065ab..b0c38077 100644
--- a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/amqp.py
+++ b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/amqp.py
@@ -556,7 +556,7 @@ class MulticallWaiter(object):
             raise StopIteration
         while True:
             try:
-                self._iterator.next()
+                next(self._iterator)
             except Exception:
                 with excutils.save_and_reraise_exception():
                     self.done()
diff --git a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_kombu.py b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_kombu.py
index c5652496..e71ebb2c 100644
--- a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_kombu.py
+++ b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_kombu.py
@@ -616,7 +616,7 @@ class Connection(object):
 
         def _declare_consumer():
             consumer = consumer_cls(self.conf, self.channel, topic, callback,
-                                    self.consumer_num.next())
+                                    next(self.consumer_num))
             self.consumers.append(consumer)
             return consumer
 
@@ -722,7 +722,7 @@ class Connection(object):
         it = self.iterconsume(limit=limit)
         while True:
             try:
-                it.next()
+                next(it)
             except StopIteration:
                 return
 
diff --git a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_qpid.py b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_qpid.py
index 4133b7dc..304ce740 100644
--- a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_qpid.py
+++ b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_qpid.py
@@ -520,7 +520,7 @@ class Connection(object):
         it = self.iterconsume(limit=limit)
         while True:
             try:
-                it.next()
+                next(it)
             except StopIteration:
                 return
 
diff --git a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_zmq.py b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_zmq.py
index cf3f40ae..3bde39f4 100644
--- a/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_zmq.py
+++ b/service-mgmt-api/sm-api/sm_api/openstack/common/rpc/impl_zmq.py
@@ -558,8 +558,8 @@ def unflatten_envelope(packenv):
     h = {}
     try:
         while True:
-            k = i.next()
-            h[k] = i.next()
+            k = next(i)
+            h[k] = next(i)
     except StopIteration:
         return h
 
diff --git a/service-mgmt-client/sm-client/sm_client/common/http.py b/service-mgmt-client/sm-client/sm_client/common/http.py
index 986994b0..29736835 100644
--- a/service-mgmt-client/sm-client/sm_client/common/http.py
+++ b/service-mgmt-client/sm-client/sm_client/common/http.py
@@ -292,7 +292,7 @@ class ResponseBodyIterator(object):
 
     def __iter__(self):
         while True:
-            yield self.next()
+            yield next(self)
 
     def next(self):
         chunk = self.resp.read(CHUNKSIZE)
@@ -300,3 +300,6 @@ class ResponseBodyIterator(object):
             return chunk
         else:
             raise StopIteration()
+
+    # In Python 3, __next__() has replaced next().
+    __next__ = next