diff --git a/os/services/lwm2m/lwm2m-engine.c b/os/services/lwm2m/lwm2m-engine.c
index 6f2aeefd8..7977e8921 100644
--- a/os/services/lwm2m/lwm2m-engine.c
+++ b/os/services/lwm2m/lwm2m-engine.c
@@ -68,9 +68,9 @@
 
 #ifndef LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX
 #ifdef LWM2M_DEVICE_MODEL_NUMBER
-#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX LWM2M_DEVICE_MODEL_NUMBER
+#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX "Contiki-NG-"LWM2M_DEVICE_MODEL_NUMBER
 #else /* LWM2M_DEVICE_MODEL_NUMBER */
-#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX "Contiki-"
+#define LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX "Contiki-NG"
 #endif /* LWM2M_DEVICE_MODEL_NUMBER */
 #endif /* LWM2M_ENGINE_CLIENT_ENDPOINT_PREFIX */