diff --git a/platform/sky/contiki-conf.h b/platform/sky/contiki-conf.h
index a4c23734e..9e7c83b40 100644
--- a/platform/sky/contiki-conf.h
+++ b/platform/sky/contiki-conf.h
@@ -153,6 +153,7 @@
 #endif /* UIP_CONF_MAX_ROUTES */
 
 #define UIP_CONF_ND6_SEND_RA		0
+#define UIP_CONF_ND6_SEND_NA		0
 #define UIP_CONF_ND6_REACHABLE_TIME     600000
 #define UIP_CONF_ND6_RETRANS_TIMER      10000