diff --git a/platform/avr-raven/contiki-conf.h b/platform/avr-raven/contiki-conf.h
index 2fe0d6099..ead35168b 100644
--- a/platform/avr-raven/contiki-conf.h
+++ b/platform/avr-raven/contiki-conf.h
@@ -162,6 +162,7 @@ typedef unsigned short uip_stats_t;
 #define UIP_CONF_ICMP6            1
 #define UIP_CONF_UDP              1
 #define UIP_CONF_TCP              1
+#define UIP_CONF_BUFFER_SIZE      1300
 #define NETSTACK_CONF_NETWORK       sicslowpan_driver
 #define SICSLOWPAN_CONF_COMPRESSION SICSLOWPAN_COMPRESSION_HC06
 #else