diff --git a/intern.h b/intern.h
index 86c3c24477..cf3f62878d 100644
--- a/intern.h
+++ b/intern.h
@@ -164,7 +164,7 @@ VALUE rb_f_require _((VALUE, VALUE));
 void rb_obj_call_init _((VALUE, int, VALUE*));
 VALUE rb_class_new_instance _((int, VALUE*, VALUE));
 VALUE rb_f_lambda _((void));
-VALUE rb_proc_new _((VALUE (*)(.../* VALUE yieldarg[, VALUE procarg] */), VALUE));
+VALUE rb_proc_new _((VALUE (*)(ANYARGS/* VALUE yieldarg[, VALUE procarg] */), VALUE));
 VALUE rb_protect _((VALUE (*)(VALUE), VALUE, int*));
 void rb_set_end_proc _((void (*)(VALUE), VALUE));
 void rb_mark_end_proc _((void));