diff --git a/openstackclient/identity/client.py b/openstackclient/identity/client.py
index 72e8bfaec0..7f5390c86b 100644
--- a/openstackclient/identity/client.py
+++ b/openstackclient/identity/client.py
@@ -36,7 +36,7 @@ def make_client(instance):
         API_NAME,
         instance._api_version[API_NAME],
         API_VERSIONS)
-    LOG.debug('Instantiating identity client: %s' % identity_client)
+    LOG.debug('Instantiating identity client: %s', identity_client)
 
     if instance._url:
         LOG.debug('Using token auth')
diff --git a/openstackclient/object/client.py b/openstackclient/object/client.py
index 006d54c517..b81ffaaf44 100644
--- a/openstackclient/object/client.py
+++ b/openstackclient/object/client.py
@@ -36,7 +36,7 @@ def make_client(instance):
         API_NAME,
         instance._api_version[API_NAME],
         API_VERSIONS)
-    LOG.debug('Instantiating object client: %s' % object_client)
+    LOG.debug('Instantiating object client: %s', object_client)
 
     if instance._url:
         endpoint = instance._url