diff --git a/plugins/doc_fragment/gcp.py b/plugins/doc_fragment/gcp.py
index e92530c..5dfeb00 100644
--- a/plugins/doc_fragment/gcp.py
+++ b/plugins/doc_fragment/gcp.py
@@ -5,6 +5,9 @@
 
 from __future__ import (absolute_import, division, print_function)
 
+__metaclass__ = type
+
+
 class ModuleDocFragment(object):
     # GCP doc fragment.
     DOCUMENTATION = r'''