diff --git a/examples/ipv6/native-border-router/Makefile b/examples/ipv6/native-border-router/Makefile
index 687319367..b28c0dc73 100644
--- a/examples/ipv6/native-border-router/Makefile
+++ b/examples/ipv6/native-border-router/Makefile
@@ -6,7 +6,7 @@ CONTIKI=../../..
 
 WITH_UIP6=1
 UIP_CONF_IPV6=1
-CFLAGS+= -DUIP_CONF_IPV6_RPL
+CFLAGS+= -DUIP_CONF_IPV6_RPL -DUIP_CONF_IPV6 -DWITH_UIP6
 
 #linker optimizations
 SMALL=1
diff --git a/examples/ipv6/native-border-router/slip-dev.c b/examples/ipv6/native-border-router/slip-dev.c
index a38c6a0c3..8aabbe528 100644
--- a/examples/ipv6/native-border-router/slip-dev.c
+++ b/examples/ipv6/native-border-router/slip-dev.c
@@ -176,7 +176,7 @@ slip_packet_input(unsigned char *data, int len)
 void
 serial_input(FILE *inslip)
 {
-  unsigned char inbuf[2048];
+  static unsigned char inbuf[2048];
   static int inbufptr = 0;
   int ret,i;
   unsigned char c;