diff --git a/src/proto/vim9script.pro b/src/proto/vim9script.pro
index 0e98039..9a0bcdf 100644
--- a/src/proto/vim9script.pro
+++ b/src/proto/vim9script.pro
@@ -19,5 +19,5 @@
 void hide_script_var(scriptitem_T *si, int idx, int func_defined);
 svar_T *find_typval_in_script(typval_T *dest, scid_T sid, int must_find);
 int check_script_var_type(svar_T *sv, typval_T *value, char_u *name, where_T where);
-int check_reserved_name(char_u *name);
+int check_reserved_name(char_u *name, cctx_T *cctx);
 /* vim: set ft=c : */