diff --git a/docs/source/conf.py b/docs/source/conf.py
index bd7d0ac..d2e37b0 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -23,7 +23,7 @@ if ON_RTD:
     # Mock the presence of matplotlib, which we don't have on RTD
     # see
     # http://read-the-docs.readthedocs.org/en/latest/faq.html
-
+    tags.add('rtd')
     class Mock(object):
         def __init__(self, *args, **kwargs):
             pass
diff --git a/docs/source/index.txt b/docs/source/index.txt
index c344faa..c97d512 100644
--- a/docs/source/index.txt
+++ b/docs/source/index.txt
@@ -7,7 +7,13 @@ IPython Documentation
    :Release: |release|
    :Date: |today|
 
-Welcome to the official IPython documentation.
+.. only:: not rtd
+
+    Welcome to the official IPython documentation.
+
+.. only:: rtd
+
+    This is a partial copy of IPython documentation, please visit `IPython official documentation <http://ipython.org/documentation.html>`_.
 
 Contents
 ========