diff --git a/src/proto/vim9compile.pro b/src/proto/vim9compile.pro
index 0790dec..9effb17 100644
--- a/src/proto/vim9compile.pro
+++ b/src/proto/vim9compile.pro
@@ -7,7 +7,7 @@
 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 get_script_item_idx(int sid, char_u *name, int check_writable, cctx_T *cctx);
+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, cctx_T *cctx);
 char_u *may_peek_next_line(cctx_T *cctx, char_u *arg, char_u **nextp);
 char_u *peek_next_line_from_context(cctx_T *cctx);