diff --git a/src/proto/fileio.pro b/src/proto/fileio.pro
index 61eb712..b24b958 100644
--- a/src/proto/fileio.pro
+++ b/src/proto/fileio.pro
@@ -49,6 +49,7 @@
 int has_insertcharpre __ARGS((void));
 void block_autocmds __ARGS((void));
 void unblock_autocmds __ARGS((void));
+int is_autocmd_blocked __ARGS((void));
 char_u *getnextac __ARGS((int c, void *cookie, int indent));
 int has_autocmd __ARGS((event_T event, char_u *sfname, buf_T *buf));
 char_u *get_augroup_name __ARGS((expand_T *xp, int idx));