diff --git a/examples/osd/rpl-border-router/project-conf.h b/examples/osd/rpl-border-router/project-conf.h
index d02caa0f1..2299703d4 100644
--- a/examples/osd/rpl-border-router/project-conf.h
+++ b/examples/osd/rpl-border-router/project-conf.h
@@ -31,6 +31,9 @@
 #ifndef PROJECT_ROUTER_CONF_H_
 #define PROJECT_ROUTER_CONF_H_
 
+#undef RDC_CONF_MCU_SLEEP
+#define RDC_CONF_MCU_SLEEP       0
+
 #ifndef UIP_FALLBACK_INTERFACE
 #define UIP_FALLBACK_INTERFACE rpl_interface
 #endif