1 files changed, 2 insertions, 4 deletions
diff --git a/upb/msg.h b/upb/msg.h
index e46733f..7f1a6e7 100644
--- a/upb/msg.h
+++ b/upb/msg.h
@@ -58,10 +58,8 @@ typedef struct {
 upb_msg *upb_msg_new(const upb_msglayout *l, upb_arena *a);
 upb_msg *upb_msg_new(const upb_msglayout *l, upb_arena *a);
 
-/* Returns the arena for the given message. */
-upb_arena *upb_msg_arena(const upb_msg *msg);
-
-void upb_msg_addunknown(upb_msg *msg, const char *data, size_t len);
+void upb_msg_addunknown(upb_msg *msg, const char *data, size_t len,
+                        upb_arena *arena);
 const char *upb_msg_getunknown(const upb_msg *msg, size_t *len);
 
 upb_array *upb_array_new(upb_fieldtype_t type, upb_arena *a);