diff --git a/rsdclient/v2/node.py b/rsdclient/v2/node.py
index c408da7..25b8098 100644
--- a/rsdclient/v2/node.py
+++ b/rsdclient/v2/node.py
@@ -13,8 +13,6 @@
 #   under the License.
 #
 
-from rsd_lib.resources.v2_1.node import constants as node_cons
-
 from rsdclient.common import base
 from rsdclient.common import utils
 
@@ -82,9 +80,6 @@ class NodeManager(base.Manager):
         node = self.client.get_node(node_uri)
         node.reset_node(action)
 
-    def set_boot_source(self, node_uri, target, enabled=None, mode=None):
-        if not enabled:
-            enabled = node_cons.BOOT_SOURCE_ENABLED_ONCE
-
+    def set_boot_source(self, node_uri, target, enabled='once', mode=None):
         node = self.client.get_node(node_uri)
         node.set_node_boot_source(target, enabled, mode)