diff --git a/arch/platform/cooja/contiki-conf.h b/arch/platform/cooja/contiki-conf.h
index 638297730..7dea26e17 100644
--- a/arch/platform/cooja/contiki-conf.h
+++ b/arch/platform/cooja/contiki-conf.h
@@ -87,8 +87,6 @@
 #define NBR_TABLE_CONF_MAX_NEIGHBORS 300
 #endif /* NBR_TABLE_CONF_MAX_NEIGHBORS */
 
-#define TCPIP_CONF_ANNOTATE_TRANSMISSIONS 1
-
 #ifndef UIP_CONF_IPV6_QUEUE_PKT
 #define UIP_CONF_IPV6_QUEUE_PKT         1
 #endif /* UIP_CONF_IPV6_QUEUE_PKT */
diff --git a/examples/6tisch/etsi-plugtest-2017/project-conf.h b/examples/6tisch/etsi-plugtest-2017/project-conf.h
index 751ccf977..7cb8158f0 100644
--- a/examples/6tisch/etsi-plugtest-2017/project-conf.h
+++ b/examples/6tisch/etsi-plugtest-2017/project-conf.h
@@ -121,6 +121,4 @@
 #define LOG_CONF_LEVEL_6TOP                        LOG_LEVEL_DBG
 #define TSCH_LOG_CONF_PER_SLOT                     1
 
-#define TCPIP_CONF_ANNOTATE_TRANSMISSIONS          0
-
 #endif /* __PROJECT_CONF_H__ */