diff --git a/include/lib/transfer_list.h b/include/lib/transfer_list.h
index 1b5ec2d..047b2d0 100644
--- a/include/lib/transfer_list.h
+++ b/include/lib/transfer_list.h
@@ -110,6 +110,7 @@
 CASSERT(sizeof(struct transfer_list_entry) == U(0x8), assert_transfer_list_entry_size);
 
 void transfer_list_dump(struct transfer_list_header *tl);
+struct transfer_list_header *transfer_list_ensure(void *addr, size_t size);
 entry_point_info_t *
 transfer_list_set_handoff_args(struct transfer_list_header *tl,
 			       entry_point_info_t *ep_info);