diff --git a/core/net/rpl/rpl-conf.h b/core/net/rpl/rpl-conf.h
index c30183934..1da6c5ea8 100644
--- a/core/net/rpl/rpl-conf.h
+++ b/core/net/rpl/rpl-conf.h
@@ -67,7 +67,7 @@
 #ifdef RPL_CONF_SUPPORTED_OFS
 #define RPL_SUPPORTED_OFS RPL_CONF_SUPPORTED_OFS
 #else /* RPL_CONF_SUPPORTED_OFS */
-#define RPL_SUPPORTED_OFS {&rpl_of0, &rpl_mrhof}
+#define RPL_SUPPORTED_OFS {&rpl_mrhof}
 #endif /* RPL_CONF_SUPPORTED_OFS */
 
 /*
diff --git a/examples/ipv6/rpl-collect/project-conf.h b/examples/ipv6/rpl-collect/project-conf.h
index 4b39f7de9..c33ca27fb 100644
--- a/examples/ipv6/rpl-collect/project-conf.h
+++ b/examples/ipv6/rpl-collect/project-conf.h
@@ -56,4 +56,11 @@
 
 #define RPL_CONF_DEFAULT_ROUTE_INFINITE_LIFETIME 1
 
+/* Save some ROM */
+#undef UIP_CONF_TCP
+#define UIP_CONF_TCP                   0
+
+#undef SICSLOWPAN_CONF_FRAG
+#define SICSLOWPAN_CONF_FRAG           0
+
 #endif /* PROJECT_CONF_H_ */
diff --git a/examples/ipv6/rpl-tsch/project-conf.h b/examples/ipv6/rpl-tsch/project-conf.h
index a725cbba0..8ac0a93b6 100644
--- a/examples/ipv6/rpl-tsch/project-conf.h
+++ b/examples/ipv6/rpl-tsch/project-conf.h
@@ -139,7 +139,7 @@
 #undef UIP_CONF_TCP
 #define UIP_CONF_TCP 0
 #undef QUEUEBUF_CONF_NUM
-#define QUEUEBUF_CONF_NUM 4
+#define QUEUEBUF_CONF_NUM 3
 #undef UIP_CONF_MAX_ROUTES
 #define UIP_CONF_MAX_ROUTES  8
 #undef NBR_TABLE_CONF_MAX_NEIGHBORS
diff --git a/platform/micaz/contiki-conf.h b/platform/micaz/contiki-conf.h
index 04aaccf6b..50e2ace1e 100644
--- a/platform/micaz/contiki-conf.h
+++ b/platform/micaz/contiki-conf.h
@@ -125,8 +125,8 @@
 #define UIP_CONF_ROUTER                 0
 
 /* configure number of neighbors and routes */
-#define NBR_TABLE_CONF_MAX_NEIGHBORS    5
-#define UIP_CONF_MAX_ROUTES             5
+#define NBR_TABLE_CONF_MAX_NEIGHBORS    4
+#define UIP_CONF_MAX_ROUTES             4
 
 #define RPL_CONF_MAX_PARENTS            4
 #define RPL_CONF_MAX_DAG_PER_INSTANCE   1
diff --git a/platform/sky/contiki-conf.h b/platform/sky/contiki-conf.h
index 39d8bc882..7665d146e 100644
--- a/platform/sky/contiki-conf.h
+++ b/platform/sky/contiki-conf.h
@@ -150,10 +150,10 @@
 
 /* configure number of neighbors and routes */
 #ifndef NBR_TABLE_CONF_MAX_NEIGHBORS
-#define NBR_TABLE_CONF_MAX_NEIGHBORS     20
+#define NBR_TABLE_CONF_MAX_NEIGHBORS     16
 #endif /* NBR_TABLE_CONF_MAX_NEIGHBORS */
 #ifndef UIP_CONF_MAX_ROUTES
-#define UIP_CONF_MAX_ROUTES   20
+#define UIP_CONF_MAX_ROUTES   16
 #endif /* UIP_CONF_MAX_ROUTES */
 
 #define UIP_CONF_ND6_SEND_RA		0
diff --git a/platform/zoul/contiki-conf.h b/platform/zoul/contiki-conf.h
index 3d07103ef..c28d789d3 100644
--- a/platform/zoul/contiki-conf.h
+++ b/platform/zoul/contiki-conf.h
@@ -512,10 +512,10 @@ typedef uint32_t rtimer_clock_t;
 #define UIP_CONF_ND6_RETRANS_TIMER       10000
 
 #ifndef NBR_TABLE_CONF_MAX_NEIGHBORS
-#define NBR_TABLE_CONF_MAX_NEIGHBORS                20
+#define NBR_TABLE_CONF_MAX_NEIGHBORS                16
 #endif
 #ifndef UIP_CONF_MAX_ROUTES
-#define UIP_CONF_MAX_ROUTES                 20
+#define UIP_CONF_MAX_ROUTES                 16
 #endif
 
 /* uIP */