diff --git a/eval_intern.h b/eval_intern.h
index 2209504aa7..217eddc02c 100644
--- a/eval_intern.h
+++ b/eval_intern.h
@@ -299,7 +299,9 @@ NORETURN(void rb_print_undef(VALUE, ID, rb_method_visibility_t));
 NORETURN(void rb_print_undef_str(VALUE, VALUE));
 NORETURN(void rb_print_inaccessible(VALUE, ID, rb_method_visibility_t));
 NORETURN(void rb_vm_localjump_error(const char *,VALUE, int));
+#if 0
 NORETURN(void rb_vm_jump_tag_but_local_jump(int));
+#endif
 NORETURN(void rb_raise_method_missing(rb_thread_t *th, int argc, const VALUE *argv,
 				      VALUE obj, int call_status));
 
diff --git a/vm.c b/vm.c
index aec75da9ef..7949c35db2 100644
--- a/vm.c
+++ b/vm.c
@@ -1450,6 +1450,7 @@ rb_vm_make_jump_tag_but_local_jump(int state, VALUE val)
     return make_localjump_error(mesg, val, state);
 }
 
+#if 0
 void
 rb_vm_jump_tag_but_local_jump(int state)
 {
@@ -1457,6 +1458,7 @@ rb_vm_jump_tag_but_local_jump(int state)
     if (!NIL_P(exc)) rb_exc_raise(exc);
     JUMP_TAG(state);
 }
+#endif
 
 NORETURN(static void vm_iter_break(rb_thread_t *th, VALUE val));