diff --git a/docs/conf.py b/docs/conf.py
index 93ac8ab64..8773b5d57 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -4,21 +4,9 @@
 import os
 import re
 
-# If we are building locally, or the build on Read the Docs looks like a PR
-# build, prefer to use the version of the theme in this repo, not the installed
-# version of the theme.
-def is_development_build():
-    # PR builds have an interger version
-    re_version = re.compile(r'^[\d]+$')
-    if 'READTHEDOCS' in os.environ:
-        version = os.environ.get('READTHEDOCS_VERSION', '')
-        if re_version.match(version):
-            return True
-        return False
-    return True
-
-if is_development_build():
-    sys.path.insert(0, os.path.abspath('..'))
+# Prefer to use the version of the theme in this repo
+# and not the installed version of the theme.
+sys.path.insert(0, os.path.abspath('..'))
 sys.path.append(os.path.abspath('./demo/'))
 
 import sphinx_rtd_theme