diff --git a/util_pkt_logger/global_conf.json b/util_pkt_logger/global_conf.json
index 55b58e3f..e036fee8 100644
--- a/util_pkt_logger/global_conf.json
+++ b/util_pkt_logger/global_conf.json
@@ -1,7 +1,7 @@
 {
     "SX1301_conf": {
         "lorawan_public": true,
-        "clksrc": 1, /* radio_1 provides clock to concentrator */
+        "clksrc": 0, /* radio_0 provides clock to concentrator */
         "radio_0": {
             "enable": true,
             "type": "SX1257",