diff --git a/saharaclient/openstack/common/importutils.py b/saharaclient/openstack/common/importutils.py
index a0e66776..fcb8f04b 100644
--- a/saharaclient/openstack/common/importutils.py
+++ b/saharaclient/openstack/common/importutils.py
@@ -24,10 +24,10 @@ import traceback
 def import_class(import_str):
     """Returns a class from a string including module and class."""
     mod_str, _sep, class_str = import_str.rpartition('.')
+    __import__(mod_str)
     try:
-        __import__(mod_str)
         return getattr(sys.modules[mod_str], class_str)
-    except (ValueError, AttributeError):
+    except AttributeError:
         raise ImportError('Class %s cannot be found (%s)' %
                           (class_str,
                            traceback.format_exception(*sys.exc_info())))