diff --git a/htdocs/lib/MapMarkers.js b/htdocs/lib/MapMarkers.js
index 902bb502..4b839228 100644
--- a/htdocs/lib/MapMarkers.js
+++ b/htdocs/lib/MapMarkers.js
@@ -295,6 +295,7 @@ FeatureMarker.prototype.getInfoHTML = function(name, receiverMarker = null) {
             var tune = mode === 'cw'?      freq - 800
                      : mode === 'fax'?     freq - 1900
                      : mode === 'rtty450'? freq - 1000
+                     : mode === 'sitorb'?  freq - 1000
                      : freq;
 
             var name = ('0000' + this.schedule[j].time1).slice(-4)
diff --git a/owrx/eibi.py b/owrx/eibi.py
index 08a8b63b..755ca470 100644
--- a/owrx/eibi.py
+++ b/owrx/eibi.py
@@ -55,6 +55,8 @@ class EIBI(object):
             return freq - 1900
         elif mode == "rtty450":
             return freq - 1000
+        elif mode == "sitorb":
+            return freq - 1000
         else:
             return freq