diff --git a/radio/rfsimulator/simulator.c b/radio/rfsimulator/simulator.c
index 32648758c8..3a2a0ae2d5 100644
--- a/radio/rfsimulator/simulator.c
+++ b/radio/rfsimulator/simulator.c
@@ -738,6 +738,10 @@ static int rfsimulator_write_internal(rfsimulator_state_t *t, openair0_timestamp
         timestamp,
         timestamp + nsamps,
         signal_energy(samplesVoid[0], nsamps));
+
+  /* trace only first antenna */
+  T(T_USRP_TX_ANT0, T_INT(timestamp), T_BUFFER(samplesVoid[0], sampleToByte(nsamps, 1)));
+
   return nsamps;
 }