diff --git a/util_tx_continuous/src/util_tx_continuous.c b/util_tx_continuous/src/util_tx_continuous.c
index 31f45ac..f9cf033 100644
--- a/util_tx_continuous/src/util_tx_continuous.c
+++ b/util_tx_continuous/src/util_tx_continuous.c
@@ -297,7 +297,7 @@ int main(int argc, char **argv)
     /* Board config */
     memset(&boardconf, 0, sizeof(boardconf));
     boardconf.lorawan_public = true;
-    boardconf.clksrc = 1; /* Radio B is source by default */
+    boardconf.clksrc = 0; /* Radio B is source by default */
     lgw_board_setconf(boardconf);
 
     /* RF config */