diff --git a/src/proto/ex_cmds.pro b/src/proto/ex_cmds.pro
index 9036dd2..1711af4 100644
--- a/src/proto/ex_cmds.pro
+++ b/src/proto/ex_cmds.pro
@@ -27,6 +27,7 @@
 void ex_z(exarg_T *eap);
 int check_restricted(void);
 int check_secure(void);
+char_u *skip_substitute(char_u *start, int delimiter);
 void ex_substitute(exarg_T *eap);
 int do_sub_msg(int count_only);
 void ex_global(exarg_T *eap);
diff --git a/src/proto/vim9execute.pro b/src/proto/vim9execute.pro
index 2124282..46b314c 100644
--- a/src/proto/vim9execute.pro
+++ b/src/proto/vim9execute.pro
@@ -4,6 +4,7 @@
 char_u *char_from_string(char_u *str, varnumber_T index);
 char_u *string_slice(char_u *str, varnumber_T first, varnumber_T last, int exclusive);
 int fill_partial_and_closure(partial_T *pt, ufunc_T *ufunc, ectx_T *ectx);
+char_u *exe_substitute_instr(void);
 int call_def_function(ufunc_T *ufunc, int argc_arg, typval_T *argv, partial_T *partial, typval_T *rettv);
 void ex_disassemble(exarg_T *eap);
 int tv2bool(typval_T *tv);