diff --git a/Documentation/sphinx/load_config.py b/Documentation/sphinx/load_config.py
index eeb394b39e2c..bc45424a406f 100644
--- a/Documentation/sphinx/load_config.py
+++ b/Documentation/sphinx/load_config.py
@@ -3,7 +3,12 @@
 
 import os
 import sys
-from sphinx.util.pycompat import execfile_
+
+def execfile_(filepath, _globals):
+    with open(filepath, 'rb') as f:
+        source = f.read()
+        code = compile(source, filepath, 'exec')
+    exec(code, _globals)
 
 # ------------------------------------------------------------------------------
 def loadConfig(namespace):