diff --git a/htdocs/index.wrx b/htdocs/index.wrx
index 885e3efb..f0919334 100644
--- a/htdocs/index.wrx
+++ b/htdocs/index.wrx
@@ -25,8 +25,6 @@
         <!-- <script type="text/javascript">
             //Global variables
             var audio_buffering_fill_to=%[AUDIO_BUFSIZE];
-			var starting_mod="%[START_MOD]";
-            var starting_offset_frequency = %[START_OFFSET_FREQ];
             var server_enable_digimodes=%[DIGIMODES_ENABLE];
 			var mathbox_waterfall_frequency_resolution=%[MATHBOX_WATERFALL_FRES];
 			var mathbox_waterfall_history_length=%[MATHBOX_WATERFALL_THIST];
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index de12eea1..8a7993ac 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -1162,6 +1162,8 @@ function on_ws_recv(evt)
                         window.waterfall_auto_level_margin = config.waterfall_auto_level_margin;
                         waterfallColorsDefault();
 
+			            window.starting_mod = config.start_mod
+                        window.starting_offset_frequency = config.start_offset_frequency;
                         bandwidth = config.samp_rate;
                         center_freq = config.shown_center_freq;
                         fft_size = config.fft_size;
diff --git a/owrx/controllers.py b/owrx/controllers.py
index f1c6ccde..9ba87eaa 100644
--- a/owrx/controllers.py
+++ b/owrx/controllers.py
@@ -64,9 +64,11 @@ class WebSocketMessageHandler(object):
 
             for key in ["waterfall_colors", "waterfall_min_level", "waterfall_max_level", "waterfall_auto_level_margin",
                         "shown_center_freq", "samp_rate", "fft_size", "fft_fps", "audio_compression", "fft_compression",
-                        "max_clients"]:
+                        "max_clients", "start_mod"]:
 
-                config[key] = pm.getProperty(key).getValue()
+                config[key] = pm.getPropertyValue(key)
+
+            config["start_offset_freq"] = pm.getPropertyValue("start_freq") - pm.getPropertyValue("center_freq")
 
             conn.send({"type":"config","value":config})
             print("client connection intitialized")