diff --git a/os_client_config/config.py b/os_client_config/config.py
index 721528d..e4a6ed7 100644
--- a/os_client_config/config.py
+++ b/os_client_config/config.py
@@ -12,6 +12,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import copy
+import sys
+
 from openstack.config import loader
 from openstack.config.loader import *  # noqa