diff --git a/manila/share/drivers/emc/driver.py b/manila/share/drivers/emc/driver.py
index 0ea4d993..72e9a94a 100644
--- a/manila/share/drivers/emc/driver.py
+++ b/manila/share/drivers/emc/driver.py
@@ -50,7 +50,6 @@ EMC_NAS_OPTS = [
                help='Container of share servers.'),
     cfg.StrOpt('emc_nas_pool_names',
                deprecated_name='emc_nas_pool_name',
-               default=None,
                help='EMC pool names.'),
     cfg.StrOpt('emc_nas_root_dir',
                help='The root directory where shares will be located.'),
diff --git a/manila/share/drivers/service_instance.py b/manila/share/drivers/service_instance.py
index b0d838ee..2cb61079 100644
--- a/manila/share/drivers/service_instance.py
+++ b/manila/share/drivers/service_instance.py
@@ -129,7 +129,6 @@ common_opts = [
         help="Password for service instance user."),
     cfg.StrOpt(
         "path_to_private_key",
-        default=None,
         help="Path to host's private key."),
     cfg.IntOpt(
         "max_time_to_build_instance",