diff --git a/transport.c b/transport.c
index 906dbad5a0..bb532d0f72 100644
--- a/transport.c
+++ b/transport.c
@@ -170,7 +170,8 @@ static struct ref *get_refs_from_bundle(struct transport *transport,
 }
 
 static int fetch_refs_from_bundle(struct transport *transport,
-			       int nr_heads, struct ref **to_fetch)
+				  int nr_heads UNUSED,
+				  struct ref **to_fetch UNUSED)
 {
 	struct bundle_transport_data *data = transport->data;
 	struct strvec extra_index_pack_args = STRVEC_INIT;