diff --git a/radio/rfsimulator/simulator.cpp b/radio/rfsimulator/simulator.cpp
index 83bdba990a..a2fb0e994d 100644
--- a/radio/rfsimulator/simulator.cpp
+++ b/radio/rfsimulator/simulator.cpp
@@ -1019,7 +1019,7 @@ static int rfsimulator_write_internal(rfsimulator_state_t *t,
         signal_energy(static_cast<int32_t *>(samplesVoid[0][0]), nsamps));
 
   /* trace only first antenna */
-  T(T_USRP_TX_ANT0, T_INT(timestamp), T_BUFFER(samplesVoid[0], (int)sampleToByte(nsamps, 1)));
+  T(T_USRP_TX_ANT0, T_INT(timestamp), T_BUFFER(samplesVoid[0][0], (int)sampleToByte(nsamps, 1)));
 
   return nsamps;
 }