diff --git a/ironic/common/pxe_utils.py b/ironic/common/pxe_utils.py
index 8c61e235dd..a6efb026b7 100644
--- a/ironic/common/pxe_utils.py
+++ b/ironic/common/pxe_utils.py
@@ -967,7 +967,7 @@ def build_service_pxe_config(task, instance_image_info,
     # fail if the agent was booted outside the direct actions of the
     # boot interface.
     if (node.provision_state in [states.ACTIVE, states.UNRESCUING,
-                                 states.DEPLOYING]
+                                 states.DEPLOYING, states.ADOPTING]
             and not os.path.isfile(pxe_config_path)):
         pxe_options = build_pxe_config_options(task, instance_image_info,
                                                service=True,
diff --git a/ironic/drivers/modules/agent.py b/ironic/drivers/modules/agent.py
index a9b3544b1a..1cb3bb5ff6 100644
--- a/ironic/drivers/modules/agent.py
+++ b/ironic/drivers/modules/agent.py
@@ -364,10 +364,11 @@ class CustomAgentDeploy(agent_base.AgentBaseMixin, agent_base.AgentDeployMixin,
                 # Alternatively, we could be in a fast track deployment
                 # and again, we should have nothing to do here.
                 return
-        if node.provision_state in (states.ACTIVE, states.UNRESCUING):
+        if node.provision_state in (states.ACTIVE, states.UNRESCUING,
+                                    states.ADOPTING):
             # Call is due to conductor takeover
             task.driver.boot.prepare_instance(task)
-        elif node.provision_state != states.ADOPTING:
+        else:
             if node.provision_state not in (states.RESCUING, states.RESCUEWAIT,
                                             states.RESCUE, states.RESCUEFAIL):
                 self._update_instance_info(task)
diff --git a/ironic/drivers/modules/pxe_base.py b/ironic/drivers/modules/pxe_base.py
index f3ac498902..5053ce0f6a 100644
--- a/ironic/drivers/modules/pxe_base.py
+++ b/ironic/drivers/modules/pxe_base.py
@@ -283,7 +283,8 @@ class PXEBaseMixin(object):
 
         # NOTE(pas-ha) do not re-set boot device on ACTIVE nodes
         # during takeover
-        if boot_device and task.node.provision_state != states.ACTIVE:
+        if boot_device and (task.node.provision_state not in
+                            (states.ACTIVE, states.ADOPTING)):
             manager_utils.node_set_boot_device(task, boot_device,
                                                persistent=True)
 
diff --git a/ironic/tests/unit/common/test_pxe_utils.py b/ironic/tests/unit/common/test_pxe_utils.py
index a57441f588..f1295cb2cf 100644
--- a/ironic/tests/unit/common/test_pxe_utils.py
+++ b/ironic/tests/unit/common/test_pxe_utils.py
@@ -2387,6 +2387,41 @@ class iPXEBuildConfigOptionsTestCase(db_base.DbTestCase):
                 os.path.join(CONF.deploy.http_root, self.node.uuid))
 
 
+@mock.patch.object(ipxe.iPXEBoot, '__init__', lambda self: None)
+class iPXEBuildServicePXEConfigTestCase(db_base.DbTestCase):
+    def setUp(self):
+        super(iPXEBuildServicePXEConfigTestCase, self).setUp()
+        n = {
+            'driver': 'fake-hardware',
+            'boot_interface': 'ipxe',
+            'instance_info': INST_INFO_DICT,
+            'driver_info': DRV_INFO_DICT,
+            'driver_internal_info': DRV_INTERNAL_INFO_DICT,
+        }
+        self.config(enabled_boot_interfaces=['ipxe'])
+        self.node = object_utils.create_test_node(self.context, **n)
+
+    @mock.patch.object(pxe_utils, 'create_pxe_config', autospec=True)
+    @mock.patch.object(deploy_utils, 'switch_pxe_config', autospec=True)
+    def test_build_service_pxe_config_adopt(self, mock_switch, mock_pxe_utils):
+        self.node.provision_state = states.ADOPTING
+
+        driver_internal_info = self.node.driver_internal_info
+        driver_internal_info['is_whole_disk_image'] = True
+        self.node.driver_internal_info = driver_internal_info
+        self.node.save()
+
+        image_info = {}
+
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=True) as task:
+            pxe_utils.build_service_pxe_config(task, image_info, 'id',
+                                               is_whole_disk_image=True)
+
+        mock_pxe_utils.assert_called()
+        mock_switch.assert_called()
+
+
 @mock.patch.object(ironic_utils, 'unlink_without_raise', autospec=True)
 @mock.patch.object(pxe_utils, 'clean_up_pxe_config', autospec=True)
 @mock.patch.object(pxe_utils, 'TFTPImageCache', autospec=True)
diff --git a/ironic/tests/unit/drivers/modules/test_agent.py b/ironic/tests/unit/drivers/modules/test_agent.py
index 0ada1e2b47..4e92ad2f44 100644
--- a/ironic/tests/unit/drivers/modules/test_agent.py
+++ b/ironic/tests/unit/drivers/modules/test_agent.py
@@ -984,6 +984,7 @@ class TestAgentDeploy(CommonTestsMixin, db_base.DbTestCase):
             self.assertTrue(storage_attach_volumes_mock.called)
             self.assertEqual(2, should_write_image_mock.call_count)
 
+    @mock.patch.object(pxe.PXEBoot, 'prepare_instance', autospec=True)
     @mock.patch.object(flat_network.FlatNetwork, 'add_provisioning_network',
                        spec_set=True, autospec=True)
     @mock.patch.object(pxe.PXEBoot, 'prepare_ramdisk', autospec=True)
@@ -992,7 +993,8 @@ class TestAgentDeploy(CommonTestsMixin, db_base.DbTestCase):
                        autospec=True)
     def test_prepare_adopting(
             self, build_instance_info_mock, build_options_mock,
-            pxe_prepare_ramdisk_mock, add_provisioning_net_mock):
+            pxe_prepare_ramdisk_mock, add_provisioning_net_mock,
+            prepare_instance_mock):
         with task_manager.acquire(
                 self.context, self.node['uuid'], shared=False) as task:
             task.node.provision_state = states.ADOPTING
@@ -1003,6 +1005,7 @@ class TestAgentDeploy(CommonTestsMixin, db_base.DbTestCase):
             self.assertFalse(build_options_mock.called)
             self.assertFalse(pxe_prepare_ramdisk_mock.called)
             self.assertFalse(add_provisioning_net_mock.called)
+            self.assertTrue(prepare_instance_mock.called)
 
     @mock.patch.object(flat_network.FlatNetwork, 'add_provisioning_network',
                        spec_set=True, autospec=True)
diff --git a/releasenotes/notes/pxe-onadopt-7214eba4f5822e1a.yaml b/releasenotes/notes/pxe-onadopt-7214eba4f5822e1a.yaml
new file mode 100644
index 0000000000..b08f6cba1a
--- /dev/null
+++ b/releasenotes/notes/pxe-onadopt-7214eba4f5822e1a.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Fixes ``enable_netboot_fallback`` to write out pxe config
+    on adopt.