diff --git a/devtools/gossipwith.c b/devtools/gossipwith.c
index 8c6e42abd..58a3eb4a6 100644
--- a/devtools/gossipwith.c
+++ b/devtools/gossipwith.c
@@ -13,6 +13,7 @@
 
 #define io_write_ simple_write
 #define io_read_ simple_read
+#define io_close simple_close
 
 static struct io_plan *simple_write(struct io_conn *conn,
 				    const void *data, size_t len,
@@ -24,6 +25,11 @@ static struct io_plan *simple_read(struct io_conn *conn,
 				   struct io_plan *(*next)(struct io_conn *, void *),
 				   void *next_arg);
 
+static struct io_plan *simple_close(struct io_conn *conn)
+{
+	return NULL;
+}
+
 #include "../connectd/handshake.c"
 
 /* This makes the handshake prototypes work. */