diff --git a/rest_framework/versioning.py b/rest_framework/versioning.py
index 3e25af1a3..3e3024866 100644
--- a/rest_framework/versioning.py
+++ b/rest_framework/versioning.py
@@ -131,7 +131,7 @@ class NamespaceVersioning(BaseVersioning):
         return request.version + ':' + viewname
 
 
-class MultipleNamespaceVersioning(versioning.NamespaceVersioning):
+class MultipleNamespaceVersioning(NamespaceVersioning):
 
     """
     This is the same as NamespaceVersioning, the difference is that