diff --git a/neutron/agent/l3/ha_router.py b/neutron/agent/l3/ha_router.py
index 2a8e4f6aacd..c5476c3c0b6 100644
--- a/neutron/agent/l3/ha_router.py
+++ b/neutron/agent/l3/ha_router.py
@@ -450,10 +450,18 @@ class HaRouter(router.RouterInfo):
         pm.enable()
         process_monitor.register(
             self.router_id, IP_MONITOR_PROCESS_SERVICE, pm)
-        LOG.debug("Router %(router_id)s %(process)s pid %(pid)d",
-                  {"router_id": self.router_id,
-                   "process": KEEPALIVED_STATE_CHANGE_MONITOR_SERVICE_NAME,
-                   "pid": pm.pid})
+        pid = pm.pid
+        process = KEEPALIVED_STATE_CHANGE_MONITOR_SERVICE_NAME
+        if pid:
+            LOG.debug("Router %(router_id)s %(process)s pid %(pid)d",
+                      {"router_id": self.router_id,
+                       "process": process,
+                       "pid": pid})
+        else:
+            LOG.warning("Could not determine pid for router %(router_id)s "
+                        "%(process)s, might still be spawning",
+                        {"router_id": self.router_id,
+                         "process": process})
 
     def destroy_state_change_monitor(self, process_monitor):
         if not self.ha_port:
diff --git a/neutron/tests/unit/agent/l3/test_ha_router.py b/neutron/tests/unit/agent/l3/test_ha_router.py
index 95ee5ef8c5d..15045448a72 100644
--- a/neutron/tests/unit/agent/l3/test_ha_router.py
+++ b/neutron/tests/unit/agent/l3/test_ha_router.py
@@ -127,6 +127,34 @@ class TestBasicRouterOperations(base.BaseTestCase):
         ri.remove_floating_ip(device, fip_cidr)
         self.assertTrue(super_remove_floating_ip.called)
 
+    @mock.patch.object(ha_router.LOG, 'debug')
+    def test_spawn_state_change_monitor(self, mock_log):
+        ri = self._create_router(mock.MagicMock())
+        with mock.patch.object(ri,
+                               '_get_state_change_monitor_process_manager')\
+                as m_get_state:
+            mock_pm = m_get_state.return_value
+            mock_pm.active = True
+            mock_pm.pid = 1234
+            ri.spawn_state_change_monitor(mock_pm)
+
+        mock_pm.enable.assert_called_once()
+        mock_log.assert_called_once()
+
+    @mock.patch.object(ha_router.LOG, 'warning')
+    def test_spawn_state_change_monitor_no_pid(self, mock_log):
+        ri = self._create_router(mock.MagicMock())
+        with mock.patch.object(ri,
+                               '_get_state_change_monitor_process_manager')\
+                as m_get_state:
+            mock_pm = m_get_state.return_value
+            mock_pm.active = True
+            mock_pm.pid = None
+            ri.spawn_state_change_monitor(mock_pm)
+
+        mock_pm.enable.assert_called_once()
+        mock_log.assert_called_once()
+
     def test_destroy_state_change_monitor_ok(self):
         ri = self._create_router(mock.MagicMock())
         # need a port for destroy_state_change_monitor() to call PM code