diff --git a/owrx/connection.py b/owrx/connection.py
index 73e1f6d..37aafa2 100644
--- a/owrx/connection.py
+++ b/owrx/connection.py
@@ -110,7 +110,6 @@ class OpenWebRxClient(Client, metaclass=ABCMeta):
 
 class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
     sdr_config_keys = [
-        "waterfall_min_level",
         "waterfall_min_level",
         "waterfall_max_level",
         "samp_rate",