diff --git a/src/proto/vim9class.pro b/src/proto/vim9class.pro
index 62d1b7d..3000f57 100644
--- a/src/proto/vim9class.pro
+++ b/src/proto/vim9class.pro
@@ -4,6 +4,8 @@
 type_T *oc_member_type(class_T *cl, int is_object, char_u *name, char_u *name_end, int *member_idx);
 type_T *oc_member_type_by_idx(class_T *cl, int is_object, int member_idx);
 void ex_enum(exarg_T *eap);
+void typealias_free(typealias_T *ta);
+void typealias_unref(typealias_T *ta);
 void ex_type(exarg_T *eap);
 int class_object_index(char_u **arg, typval_T *rettv, evalarg_T *evalarg, int verbose);
 ufunc_T *find_class_func(char_u **arg);