diff --git a/src/proto/evalvars.pro b/src/proto/evalvars.pro
index f304872..010e630 100644
--- a/src/proto/evalvars.pro
+++ b/src/proto/evalvars.pro
@@ -23,6 +23,7 @@
 void ex_lockvar(exarg_T *eap);
 void ex_unletlock(exarg_T *eap, char_u *argstart, int deep, int glv_flags, int (*callback)(lval_T *, char_u *, exarg_T *, int, void *), void *cookie);
 int do_unlet(char_u *name, int forceit);
+void item_lock(typval_T *tv, int deep, int lock, int check_refcount);
 void del_menutrans_vars(void);
 char_u *get_user_var_name(expand_T *xp, int idx);
 char *get_var_special_name(int nr);
@@ -65,7 +66,7 @@
 void vars_clear(hashtab_T *ht);
 void vars_clear_ext(hashtab_T *ht, int free_val);
 void set_var(char_u *name, typval_T *tv, int copy);
-void set_var_const(char_u *name, type_T *type, typval_T *tv, int copy, int flags);
+void set_var_const(char_u *name, type_T *type, typval_T *tv_arg, int copy, int flags);
 int var_check_ro(int flags, char_u *name, int use_gettext);
 int var_check_fixed(int flags, char_u *name, int use_gettext);
 int var_wrong_func_name(char_u *name, int new_var);