diff --git a/src/proto/ops.pro b/src/proto/ops.pro
index cbe49cc..c46af05 100644
--- a/src/proto/ops.pro
+++ b/src/proto/ops.pro
@@ -17,5 +17,7 @@
 void op_addsub(oparg_T *oap, linenr_T Prenum1, int g_cmd);
 void clear_oparg(oparg_T *oap);
 void cursor_pos_info(dict_T *dict);
+int set_operatorfunc_option(void);
+void free_operatorfunc_option(void);
 void do_pending_operator(cmdarg_T *cap, int old_col, int gui_yank);
 /* vim: set ft=c : */
diff --git a/src/proto/option.pro b/src/proto/option.pro
index 13b9c1b..ea6baa7 100644
--- a/src/proto/option.pro
+++ b/src/proto/option.pro
@@ -10,7 +10,7 @@
 void set_helplang_default(char_u *lang);
 void set_title_defaults(void);
 void ex_set(exarg_T *eap);
-int do_set(char_u *arg, int opt_flags);
+int do_set(char_u *arg_start, int opt_flags);
 void did_set_option(int opt_idx, int opt_flags, int new_value, int value_checked);
 int string_to_key(char_u *arg, int multi_byte);
 void did_set_title(void);
@@ -78,4 +78,5 @@
 dict_T *get_winbuf_options(int bufopt);
 int fill_culopt_flags(char_u *val, win_T *wp);
 int magic_isset(void);
+int option_set_callback_func(char_u *optval, callback_T *optcb);
 /* vim: set ft=c : */