diff --git a/src/proto/vim9execute.pro b/src/proto/vim9execute.pro
index 708f69a..f8e8106 100644
--- a/src/proto/vim9execute.pro
+++ b/src/proto/vim9execute.pro
@@ -9,11 +9,11 @@
 int add_defer_function(char_u *name, int argcount, typval_T *argvars);
 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, short loop_var_idx, short loop_var_count, ectx_T *ectx);
+int fill_partial_and_closure(partial_T *pt, ufunc_T *ufunc, loopvarinfo_T *loopvarinfo, ectx_T *ectx);
 int may_load_script(int sid, int *loaded);
 typval_T *lookup_debug_var(char_u *name);
 int may_break_in_function(ufunc_T *ufunc);
-void loopvars_check_refcount(loopvars_T *loopvars);
+int loopvars_check_refcount(loopvars_T *loopvars);
 int set_ref_in_loopvars(int copyID);
 int exe_typval_instr(typval_T *tv, typval_T *rettv);
 char_u *exe_substitute_instr(void);