diff --git a/after/ftplugin/python/jedi.vim b/after/ftplugin/python/jedi.vim
index 79a1ef9..8174d9c 100644
--- a/after/ftplugin/python/jedi.vim
+++ b/after/ftplugin/python/jedi.vim
@@ -10,8 +10,8 @@ if g:jedi#auto_initialization
 
         " map ctrl+space for autocompletion
         if g:jedi#completions_command == "<C-Space>"
-            " in terminals, <C-Space> sometimes equals <Nul>
-            inoremap <expr> <Nul> jedi#complete_string(0)
+            " In terminals, <C-Space> sometimes equals <Nul>.
+            imap <buffer> <Nul> <C-Space>
         endif
         if g:jedi#completions_command != ""
             execute "inoremap <expr> <buffer> ".g:jedi#completions_command." jedi#complete_string(0)"