diff --git a/examples/radio/radio-test.py b/examples/radio/radio-test.py
index e94755e28..d7129977e 100644
--- a/examples/radio/radio-test.py
+++ b/examples/radio/radio-test.py
@@ -12,6 +12,7 @@
     ack packet enabled to get RSSI feedback. To configure the Crazyflie in this
     mode build the crazyflie2-nrf-firmware with
     ```make BLE=0 CONFIG=-DRSSI_ACK_PACKET```.
+    Additionally, the Crazyflie must be using the default address 0xE7E7E7E7E7.
     See https://github.com/bitcraze/crazyflie-lib-python/issues/131 for more
     informations.
 '''