diff --git a/cinder/volume/drivers/infinidat.py b/cinder/volume/drivers/infinidat.py
index 5a40c5e599f..a2b2af8b0da 100644
--- a/cinder/volume/drivers/infinidat.py
+++ b/cinder/volume/drivers/infinidat.py
@@ -48,7 +48,7 @@ try:
     from infi.dtypes import wwn
     import infinisdk
 except ImportError:
-    capacity = None
+    from oslo_utils import units as capacity
     infinisdk = None
     iqn = None
     wwn = None