diff --git a/README.rst b/README.rst
index 710f189..798e2ee 100644
--- a/README.rst
+++ b/README.rst
@@ -67,7 +67,8 @@ Installation
 You might want to use `pathogen <https://github.com/tpope/vim-pathogen>`_ or
 `vundle <https://github.com/gmarik/vundle>`_ to install jedi in VIM. Also you
 need a VIM version that was compiled with ``+python``, which is typical for most
-distributions on Linux.
+distributions on Linux.  The Python version compiled into VIM must be 2.6 or later
+(you can check this from within VIM using ``:python import sys; print sys.version`` )
 
 The first thing you need after that is an up-to-date version of Jedi. You can
 either get it via ``pip install jedi`` or with ``git submodule update --init``