diff --git a/nbd.c b/nbd.c
index 9bebe4a..ee5427c 100644
--- a/nbd.c
+++ b/nbd.c
@@ -264,7 +264,7 @@
                   Request (type == 2)
 */
 
-int nbd_negotiate(BlockDriverState *bs, int csock, off_t size)
+int nbd_negotiate(int csock, off_t size)
 {
 	char buf[8 + 8 + 8 + 128];