diff --git a/examples/rpl-border-router/common/border-router-common.c b/examples/rpl-border-router/common/border-router-common.c
index c078057af00f20e623949dc7796b124ef03a6c14..830212a50e61a1be2d9281ab77af44b7c683b534 100644
--- a/examples/rpl-border-router/common/border-router-common.c
+++ b/examples/rpl-border-router/common/border-router-common.c
@@ -39,7 +39,6 @@
 #define LOG_MODULE "BR"
 #define LOG_LEVEL LOG_LEVEL_INFO
 
-uip_ipaddr_t prefix;
 uint8_t prefix_set;
 
 /*---------------------------------------------------------------------------*/
@@ -64,7 +63,6 @@ void
  void
  set_prefix_64(uip_ipaddr_t *prefix_64)
  {
-   memcpy(&prefix, prefix_64, 16);
    prefix_set = 1;
    rpl_dag_root_init(prefix_64, NULL);
    rpl_dag_root_init_dag_immediately();
diff --git a/examples/rpl-border-router/common/border-router-common.h b/examples/rpl-border-router/common/border-router-common.h
index 14775efad677fec0aa721033beb55ebb0871ad31..25d58aab09cfec3bc389bc65565cee26e403e8c0 100644
--- a/examples/rpl-border-router/common/border-router-common.h
+++ b/examples/rpl-border-router/common/border-router-common.h
@@ -34,7 +34,6 @@
 #include "net/ipv6/uip.h"
 #include "net/ipv6/uip-ds6.h"
 
-extern uip_ipaddr_t prefix;
 extern uint8_t prefix_set;
 
 void print_local_addresses(void);