diff --git a/keystoneauth1/loading/_utils.py b/keystoneauth1/loading/_utils.py
index 88e93bac..98326aaa 100644
--- a/keystoneauth1/loading/_utils.py
+++ b/keystoneauth1/loading/_utils.py
@@ -10,11 +10,16 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import typing as ty
+
+if ty.TYPE_CHECKING:
+    from oslo_config import cfg as _cfg
+
 cfg = None
 _NOT_FOUND = object()
 
 
-def get_oslo_config():
+def get_oslo_config() -> '_cfg':
     """Runtime load the oslo.config object.
 
     In performance optimization of openstackclient it was determined that even
diff --git a/setup.cfg b/setup.cfg
index 73da2647..af76217d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -176,3 +176,6 @@ disallow_untyped_defs = true
 
 [mypy-keystoneauth1.loading.session]
 disallow_untyped_defs = true
+
+[mypy-keystoneauth1.loading._utils]
+disallow_untyped_defs = true