diff --git a/doc/source/conf.py b/doc/source/conf.py
index dc45aa96ca..61e8913d54 100755
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -21,11 +21,14 @@ sys.path.insert(0, os.path.abspath('../..'))
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = [
-    'sphinx.ext.autodoc',
-    #'sphinx.ext.intersphinx',
-    'oslosphinx'
+    'sphinx.ext.autodoc'
 ]
 
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+
+if not on_rtd:
+    extensions.append('oslosphinx')
+
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
 # text edit cycles.
 # execute "export SPHINX_DEBUG=1" in your terminal to disable