diff --git a/indent/python.vim b/indent/python.vim
index d79a6a7..119f721 100644
--- a/indent/python.vim
+++ b/indent/python.vim
@@ -16,7 +16,7 @@ setlocal indentkeys+=<:>,=elif,=except
 " Derived from the default GetPythonIndent removing deliberate use of invalid
 " expressions which show up with 'set debug=msg,throw', also remove the indent
 " config options.
-function PythonIndent(lnum)
+function! PythonIndent(lnum)
   " If this line is explicitly joined: If the previous line was also joined,
   " line it up with that one, otherwise add two 'shiftwidth'
   if getline(a:lnum - 1) =~# '\\$'