diff --git a/plugin/UltiSnips.vim b/plugin/UltiSnips.vim
index 6603b48..31749fc 100644
--- a/plugin/UltiSnips.vim
+++ b/plugin/UltiSnips.vim
@@ -11,6 +11,13 @@ if exists('did_UltiSnips_vim') || &cp || version < 700
     finish
 endif
 
+" Define dummy version of function called by autocommand setup in
+" ftdetect/UltiSnips.vim.  If the function isn't defined (probably due to
+" using a copy of vim without python support) it will cause an error anytime a
+" new file is opened.
+function! UltiSnips_FileTypeChanged()
+endfunction
+
 if !exists("g:UltiSnipsUsePythonVersion")
     let g:_uspy=":py3 "
     if !has("python3")