diff --git a/autoload/jedi.vim b/autoload/jedi.vim
index 89b92c5..a9a6a39 100644
--- a/autoload/jedi.vim
+++ b/autoload/jedi.vim
@@ -26,7 +26,7 @@ function! jedi#complete(findstart, base)
 endfunction
 
 
-function jedi#show_func_def()
+function! jedi#show_func_def()
     python jedi_vim.show_func_def()
 endfunction