diff --git a/src/include/lwip/api_msg.h b/src/include/lwip/api_msg.h
index dc9bc55b..510acc22 100644
--- a/src/include/lwip/api_msg.h
+++ b/src/include/lwip/api_msg.h
@@ -52,7 +52,6 @@ extern "C" {
  */
 struct api_msg_msg {
   struct netconn *conn;
-  enum netconn_type conntype;
   union {
     struct netbuf *b; /* do_send */
     struct {