diff --git a/src/proto/syntax.pro b/src/proto/syntax.pro
index 34fbcb8..3a29674 100644
--- a/src/proto/syntax.pro
+++ b/src/proto/syntax.pro
@@ -10,7 +10,7 @@
 int syntax_present __ARGS((buf_T *buf));
 void set_context_in_syntax_cmd __ARGS((expand_T *xp, char_u *arg));
 char_u *get_syntax_name __ARGS((expand_T *xp, int idx));
-int syn_get_id __ARGS((long lnum, long col, int trans));
+int syn_get_id __ARGS((long lnum, colnr_T col, int trans, int *spellp));
 int syn_get_foldlevel __ARGS((win_T *wp, long lnum));
 void init_highlight __ARGS((int both, int reset));
 int load_colors __ARGS((char_u *name));