diff --git a/src/proto/vim9class.pro b/src/proto/vim9class.pro
index d09f654..9edf354 100644
--- a/src/proto/vim9class.pro
+++ b/src/proto/vim9class.pro
@@ -1,5 +1,5 @@
 /* vim9class.c */
-int object_index_from_itf_index(class_T *itf, int is_method, int idx, class_T *cl, int is_static);
+int object_index_from_itf_index(class_T *itf, int is_method, int idx, class_T *cl);
 void ex_class(exarg_T *eap);
 type_T *class_member_type(class_T *cl, int is_object, char_u *name, char_u *name_end, int *member_idx);
 void ex_enum(exarg_T *eap);
diff --git a/src/proto/vim9instr.pro b/src/proto/vim9instr.pro
index 44e6b98..7c13f93 100644
--- a/src/proto/vim9instr.pro
+++ b/src/proto/vim9instr.pro
@@ -4,8 +4,8 @@
 isn_T *generate_instr_type(cctx_T *cctx, isntype_T isn_type, type_T *type);
 isn_T *generate_instr_debug(cctx_T *cctx);
 int generate_CONSTRUCT(cctx_T *cctx, class_T *cl);
-int generate_GET_OBJ_MEMBER(cctx_T *cctx, int idx, type_T *type, int is_static);
-int generate_GET_ITF_MEMBER(cctx_T *cctx, class_T *itf, int idx, type_T *type, int is_static);
+int generate_GET_OBJ_MEMBER(cctx_T *cctx, int idx, type_T *type);
+int generate_GET_ITF_MEMBER(cctx_T *cctx, class_T *itf, int idx, type_T *type);
 int generate_STORE_THIS(cctx_T *cctx, int idx);
 int may_generate_2STRING(int offset, int tolerant, cctx_T *cctx);
 int generate_add_instr(cctx_T *cctx, vartype_T vartype, type_T *type1, type_T *type2, exprtype_T expr_type);