diff --git a/ohmpi/hardware_system.py b/ohmpi/hardware_system.py
index e284569c4cbfce03c2f772e601d1009d4a9778d3..46332b0a65e4b51bf16a30c35a9200c7d55f455f 100644
--- a/ohmpi/hardware_system.py
+++ b/ohmpi/hardware_system.py
@@ -190,6 +190,7 @@ class OhmPiHardware:
             get_rx_gain.join()
             injection.join()
             tx_gains.append(self.tx.gain)
+            rx_gains.append(self.rx.gain)
 
             # v = self.readings[:, 2] != 0
             # current = max(current, np.mean(self.readings[v, 3]))