diff --git a/util/cbfstool/cbfs.h b/util/cbfstool/cbfs.h
index 73ee49c..52a4a50 100644
--- a/util/cbfstool/cbfs.h
+++ b/util/cbfstool/cbfs.h
@@ -131,5 +131,7 @@
 /* cbfs-mkpayload.c */
 void xdr_segs(struct buffer *output,
 	      struct cbfs_payload_segment *segs, int nseg);
+void xdr_get_seg(struct cbfs_payload_segment *out,
+		struct cbfs_payload_segment *in);
 
 #endif