diff --git a/cinder/volume/flows/common.py b/cinder/volume/flows/common.py
index f5e34d4fe38..2378db853f2 100644
--- a/cinder/volume/flows/common.py
+++ b/cinder/volume/flows/common.py
@@ -32,9 +32,9 @@ def make_pretty_name(method):
     """Makes a pretty name for a function/method."""
     meth_pieces = [method.__name__]
     # If its an instance method attempt to tack on the class name
-    if hasattr(method, 'im_self') and method.im_self is not None:
+    if hasattr(method, '__self__') and method.__self__ is not None:
         try:
-            meth_pieces.insert(0, method.im_self.__class__.__name__)
+            meth_pieces.insert(0, method.__self__.__class__.__name__)
         except AttributeError:
             pass
     return ".".join(meth_pieces)