diff --git a/src/include/lwip/api.h b/src/include/lwip/api.h
index d4197f1a..5fa45104 100644
--- a/src/include/lwip/api.h
+++ b/src/include/lwip/api.h
@@ -212,7 +212,7 @@ err_t   netconn_join_leave_group(struct netconn *conn, struct ip_addr *multiaddr
 err_t   netconn_gethostbyname(const char *name, struct ip_addr *addr);
 #endif /* LWIP_DNS */
 
-#define netconn_err(conn)          ((conn)->err)
+#define netconn_err(conn)          ((conn)->last_err)
 #define netconn_recv_bufsize(conn) ((conn)->recv_bufsize)
 
 #ifdef __cplusplus