diff --git a/src/proto/vim9compile.pro b/src/proto/vim9compile.pro
index 13b96c2..9f2263a 100644
--- a/src/proto/vim9compile.pro
+++ b/src/proto/vim9compile.pro
@@ -5,9 +5,9 @@
 int script_is_vim9(void);
 int script_var_exists(char_u *name, size_t len, cctx_T *cctx, cstack_T *cstack);
 int check_defined(char_u *p, size_t len, cctx_T *cctx, cstack_T *cstack, int is_arg);
-int need_type_where(type_T *actual, type_T *expected, int offset, where_T where, cctx_T *cctx, int silent, int actual_is_const);
-int need_type(type_T *actual, type_T *expected, int offset, int arg_idx, cctx_T *cctx, int silent, int actual_is_const);
-lvar_T *reserve_local(cctx_T *cctx, char_u *name, size_t len, int isConst, type_T *type);
+int need_type_where(type_T *actual, type_T *expected, int number_ok, int offset, where_T where, cctx_T *cctx, int silent, int actual_is_const);
+int need_type(type_T *actual, type_T *expected, int number_ok, int offset, int arg_idx, cctx_T *cctx, int silent, int actual_is_const);
+lvar_T *reserve_local(cctx_T *cctx, char_u *name, size_t len, int assign, type_T *type);
 int get_script_item_idx(int sid, char_u *name, int check_writable, cctx_T *cctx, cstack_T *cstack);
 imported_T *find_imported(char_u *name, size_t len, int load);
 char_u *may_peek_next_line(cctx_T *cctx, char_u *arg, char_u **nextp);
diff --git a/src/proto/vim9instr.pro b/src/proto/vim9instr.pro
index c242148..e92fe10 100644
--- a/src/proto/vim9instr.pro
+++ b/src/proto/vim9instr.pro
@@ -15,7 +15,7 @@
 int generate_CONCAT(cctx_T *cctx, int count);
 int generate_2BOOL(cctx_T *cctx, int invert, int offset);
 int generate_COND2BOOL(cctx_T *cctx);
-int generate_TYPECHECK(cctx_T *cctx, type_T *expected, int offset, int is_var, int argidx);
+int generate_TYPECHECK(cctx_T *cctx, type_T *expected, int number_ok, int offset, int is_var, int argidx);
 int generate_SETTYPE(cctx_T *cctx, type_T *expected);
 int generate_tv_PUSH(cctx_T *cctx, typval_T *tv);
 int generate_PUSHNR(cctx_T *cctx, varnumber_T number);