diff --git a/platform/z1/contiki-z1-main.c b/platform/z1/contiki-z1-main.c
index 78e1f4669..bab055d08 100644
--- a/platform/z1/contiki-z1-main.c
+++ b/platform/z1/contiki-z1-main.c
@@ -268,6 +268,7 @@ main(int argc, char **argv)
   /*
    * Initialize Contiki and our processes.
    */
+  random_init(node_mac[6] + node_mac[7]);
   process_init();
   process_start(&etimer_process, NULL);