diff --git a/dist/tools/mosquitto_rsmb/config.cnf b/dist/tools/mosquitto_rsmb/config.cnf
index 013b006c7cb4a5e790e211434be180ff2b9198ea..0a311918c9c455bd17885b630bfcfc534537b4ef 100644
--- a/dist/tools/mosquitto_rsmb/config.cnf
+++ b/dist/tools/mosquitto_rsmb/config.cnf
@@ -4,3 +4,7 @@ trace_output protocol
 # MQTT-SN listener
 listener 1883 INADDR_ANY mqtts
 ipv6 true
+
+# MQTT listener
+listener 1883 INADDR_ANY mqtt
+ipv6 true