diff --git a/plugin/makejob.vim b/plugin/makejob.vim
index af25042..0f0bbf2 100644
--- a/plugin/makejob.vim
+++ b/plugin/makejob.vim
@@ -12,7 +12,7 @@ let s:jobinfo = {}
 
 function! s:Function(name)
     return substitute(a:name, '^s:', matchstr(expand('<sfile>'), 
-                \'<SNR>\d\+_\zefunction$'),'')
+                \'<SNR>\d\+_\ze[fF]unction$'),'')
 endfunction
 
 function! s:JobHandler(channel) abort