diff --git a/platform/cc2530dk/contiki-conf.h b/platform/cc2530dk/contiki-conf.h
index 620ae2a17..f4fd61879 100644
--- a/platform/cc2530dk/contiki-conf.h
+++ b/platform/cc2530dk/contiki-conf.h
@@ -156,11 +156,13 @@
 #endif /* UIP_CONF_IPV6 */
 
 /* Network Stack */
+#ifndef NETSTACK_CONF_NETWORK
 #if UIP_CONF_IPV6
 #define NETSTACK_CONF_NETWORK sicslowpan_driver
 #else
 #define NETSTACK_CONF_NETWORK rime_driver
-#endif
+#endif /* UIP_CONF_IPV6 */
+#endif /* NETSTACK_CONF_NETWORK */
 
 #ifndef NETSTACK_CONF_MAC
 #define NETSTACK_CONF_MAC     csma_driver
@@ -176,7 +178,10 @@
 #define NETSTACK_CONF_RDC_CHANNEL_CHECK_RATE 8
 #endif
 
+#ifndef NETSTACK_CONF_FRAMER
 #define NETSTACK_CONF_FRAMER  framer_802154
+#endif
+
 #define NETSTACK_CONF_RADIO   cc2530_rf_driver
 
 /* RF Config */
@@ -227,7 +232,9 @@
 #endif
 
 /* uIP */
+#ifndef UIP_CONF_BUFFER_SIZE
 #define UIP_CONF_BUFFER_SIZE               240
+#endif
 #define UIP_CONF_IPV6_QUEUE_PKT              0
 #define UIP_CONF_IPV6_CHECKS                 1
 #define UIP_CONF_IPV6_REASSEMBLY             0
@@ -247,7 +254,10 @@
 }
 
 #define MAC_CONF_CHANNEL_CHECK_RATE          8
+
+#ifndef QUEUEBUF_CONF_NUM
 #define QUEUEBUF_CONF_NUM                    6
+#endif
 
 #else /* UIP_CONF_IPV6 */
 /* Network setup for non-IPv6 (rime). */
diff --git a/platform/sensinode/contiki-conf.h b/platform/sensinode/contiki-conf.h
index 19a815c07..e14a46c08 100644
--- a/platform/sensinode/contiki-conf.h
+++ b/platform/sensinode/contiki-conf.h
@@ -158,11 +158,13 @@
 #endif
 
 /* Network Stack */
+#ifndef NETSTACK_CONF_NETWORK
 #if UIP_CONF_IPV6
 #define NETSTACK_CONF_NETWORK sicslowpan_driver
 #else
 #define NETSTACK_CONF_NETWORK rime_driver
-#endif
+#endif /* UIP_CONF_IPV6 */
+#endif /* NETSTACK_CONF_NETWORK */
 
 #ifndef NETSTACK_CONF_MAC
 #define NETSTACK_CONF_MAC     csma_driver
@@ -178,7 +180,10 @@
 #define NETSTACK_CONF_RDC_CHANNEL_CHECK_RATE 8
 #endif
 
+#ifndef NETSTACK_CONF_FRAMER
 #define NETSTACK_CONF_FRAMER  framer_802154
+#endif
+
 #define NETSTACK_CONF_RADIO   cc2430_rf_driver
 
 /* RF Config */
@@ -233,7 +238,9 @@
 #endif
 
 /* uIP */
+#ifndef UIP_CONF_BUFFER_SIZE
 #define UIP_CONF_BUFFER_SIZE               240
+#endif
 #define UIP_CONF_IPV6_QUEUE_PKT              0
 #define UIP_CONF_IPV6_CHECKS                 1
 #define UIP_CONF_IPV6_REASSEMBLY             0