diff --git a/session.vim b/session.vim
index 4629fcc4f3..2785f2ef6e 100644
--- a/session.vim
+++ b/session.vim
@@ -15,6 +15,7 @@ let g:syntastic_cpp_include_dirs = [
 let g:syntastic_c_include_dirs = g:syntastic_cpp_include_dirs
 let g:syntastic_python_flake8_exec = 'flake8-python2'
 let g:syntastic_python_flake8_args = '--filename='. shellescape('*.py,*.recipe')
+let g:python_version_2 = 1
 
 set wildignore+=resources/viewer/mathjax/*
 set wildignore+=resources/rapydscript/lib/*