diff --git a/doc/source/conf.py b/doc/source/conf.py
index 1eef9f2d5..b63dda3ad 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -24,12 +24,18 @@ sys.path.insert(0, os.path.abspath('./'))
 extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.todo',
-    'openstackdocstheme',
+    #'openstackdocstheme',
     #'sphinx.ext.intersphinx',
     'oslo_config.sphinxext',
     'oslo_config.sphinxconfiggen',
 ]
 
+# Don't use default openstack theme, for readthedocs
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+
+if not on_rtd:
+    extensions.append('openstackdocstheme')
+
 # openstackdocstheme options
 repository_name = 'openstack/congress'
 bug_project = 'congress'