diff --git a/doc/conf.py b/doc/conf.py
index 908223bcb..7dac941ee 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -191,7 +191,6 @@ html_context = {
    'versions': ( ("latest", "/latest/"),
                  ("1.6.1", "/1.6.1/"),
                  ("1.6", "/1.6/"),
-                 ("1.6", "/1.6/"),
                  ("1.5", "/1.5/"),
                  ("1.4", "/1.4/"),
                  ("1.3", "/1.3/"),