diff --git a/src/proto/fileio.pro b/src/proto/fileio.pro
index 2f5897c..4348d36 100644
--- a/src/proto/fileio.pro
+++ b/src/proto/fileio.pro
@@ -36,6 +36,7 @@
 int apply_autocmds __ARGS((EVENT_T event, char_u *fname, char_u *fname_io, int force, buf_T *buf));
 int apply_autocmds_retval __ARGS((EVENT_T event, char_u *fname, char_u *fname_io, int force, buf_T *buf, int *retval));
 int has_cursorhold __ARGS((void));
+int trigger_cursorhold __ARGS((void));
 int has_autocmd __ARGS((EVENT_T event, char_u *sfname, buf_T *buf));
 char_u *get_augroup_name __ARGS((expand_T *xp, int idx));
 char_u *set_context_in_autocmd __ARGS((expand_T *xp, char_u *arg, int doautocmd));