diff --git a/ironic/drivers/modules/deploy_utils.py b/ironic/drivers/modules/deploy_utils.py
index 3575a7732c..dc57c85a42 100644
--- a/ironic/drivers/modules/deploy_utils.py
+++ b/ironic/drivers/modules/deploy_utils.py
@@ -588,11 +588,21 @@ def get_boot_option(node):
         return 'local'
     if is_anaconda_deploy(node):
         return 'kickstart'
+    if is_ramdisk_deploy(node):
+        return 'ramdisk'
     capabilities = utils.parse_instance_info_capabilities(node)
     return capabilities.get('boot_option',
                             CONF.deploy.default_boot_option).lower()
 
 
+# FIXME(dtantsur): relying on deploy interface name is an anti-pattern.
+# Refactor the code so that the deploy interface itself provides the only boot
+# option it supports.
+
+def is_ramdisk_deploy(node):
+    return node.deploy_interface == 'ramdisk'
+
+
 def is_anaconda_deploy(node):
     """Determine if Anaconda deploy interface is in use for the deployment.
 
diff --git a/ironic/drivers/modules/pxe.py b/ironic/drivers/modules/pxe.py
index 07b54acae5..a91a33e5bb 100644
--- a/ironic/drivers/modules/pxe.py
+++ b/ironic/drivers/modules/pxe.py
@@ -90,19 +90,6 @@ class PXERamdiskDeploy(agent_base.AgentBaseMixin, agent_base.HeartbeatMixin,
     @task_manager.require_exclusive_lock
     def prepare(self, task):
         node = task.node
-        # Log a warning if the boot_option is wrong... and
-        # otherwise reset it.
-        boot_option = deploy_utils.get_boot_option(node)
-        if boot_option != 'ramdisk':
-            LOG.warning('Incorrect "boot_option" set for node %(node)s '
-                        'and will be overridden to "ramdisk" as to '
-                        'match the deploy interface. Found: %(boot_opt)s.',
-                        {'node': node.uuid,
-                         'boot_opt': boot_option})
-            i_info = task.node.instance_info
-            i_info.update({'capabilities': {'boot_option': 'ramdisk'}})
-            node.instance_info = i_info
-            node.save()
 
         deploy_utils.populate_storage_driver_internal_info(task)
         if node.provision_state == states.DEPLOYING:
diff --git a/ironic/tests/unit/drivers/modules/test_pxe.py b/ironic/tests/unit/drivers/modules/test_pxe.py
index 0ad0249b05..7498f20628 100644
--- a/ironic/tests/unit/drivers/modules/test_pxe.py
+++ b/ironic/tests/unit/drivers/modules/test_pxe.py
@@ -941,8 +941,6 @@ class PXERamdiskDeployTestCase(db_base.DbTestCase):
         with task_manager.acquire(self.context, node.uuid) as task:
             task.driver.deploy.prepare(task)
             self.assertFalse(mock_prepare_instance.called)
-            self.assertEqual({'boot_option': 'ramdisk'},
-                             task.node.instance_info['capabilities'])
 
     @mock.patch.object(pxe.PXEBoot, 'prepare_instance', autospec=True)
     def test_prepare_active(self, mock_prepare_instance):
@@ -962,22 +960,6 @@ class PXERamdiskDeployTestCase(db_base.DbTestCase):
             task.driver.deploy.prepare(task)
             mock_prepare_instance.assert_called_once_with(mock.ANY, task)
 
-    @mock.patch.object(pxe.LOG, 'warning', autospec=True)
-    @mock.patch.object(pxe.PXEBoot, 'prepare_instance', autospec=True)
-    def test_prepare_fixes_and_logs_boot_option_warning(
-            self, mock_prepare_instance, mock_warning):
-        node = self.node
-        node.properties['capabilities'] = 'boot_option:ramdisk'
-        node.provision_state = states.DEPLOYING
-        node.instance_info = {}
-        node.save()
-        with task_manager.acquire(self.context, node.uuid) as task:
-            task.driver.deploy.prepare(task)
-            self.assertFalse(mock_prepare_instance.called)
-            self.assertEqual({'boot_option': 'ramdisk'},
-                             task.node.instance_info['capabilities'])
-            self.assertTrue(mock_warning.called)
-
     @mock.patch.object(deploy_utils, 'validate_image_properties',
                        autospec=True)
     def test_validate(self, mock_validate_img):