diff --git a/core/net/rpl/rpl-ext-header.c b/core/net/rpl/rpl-ext-header.c
index 9c736b4c1..fb430fa8d 100644
--- a/core/net/rpl/rpl-ext-header.c
+++ b/core/net/rpl/rpl-ext-header.c
@@ -279,7 +279,6 @@ rpl_update_header_final(uip_ipaddr_t *addr)
         }
         UIP_EXT_HDR_OPT_RPL_BUF->instance = default_instance->instance_id;
         UIP_EXT_HDR_OPT_RPL_BUF->senderrank = UIP_HTONS(default_instance->current_dag->rank);
-        uip_ext_len = last_uip_ext_len;
       }
     }
   }