diff --git a/src/zapit/include/zapit/getservices.h b/src/zapit/include/zapit/getservices.h
index a0439a1ff..3de645b9c 100644
--- a/src/zapit/include/zapit/getservices.h
+++ b/src/zapit/include/zapit/getservices.h
@@ -164,6 +164,7 @@ class CServiceManager
 		void FreeNumber(int number, bool radio);
 		void UseNumber(int number, bool radio);
 		void SetServicesChanged(bool changed) { services_changed = changed; }
+		void UpdateSatTransponders(t_satellite_position satellitePosition);
 
 		bool GetTransponder(transponder &t);
 		transponder_list_t & GetSatelliteTransponders(t_satellite_position position) { return satelliteTransponders[position]; }
diff --git a/src/zapit/src/getservices.cpp b/src/zapit/src/getservices.cpp
index a65856423..20bf61ad9 100644
--- a/src/zapit/src/getservices.cpp
+++ b/src/zapit/src/getservices.cpp
@@ -328,7 +328,7 @@ void CServiceManager::ParseTransponders(xmlNodePtr node, t_satellite_position sa
 
 		ret = transponders.insert(transponder_pair_t(tid, t));
 		if (ret.second == false)
-			t.dump("[zapit] duplicate");
+			t.dump("[zapit] duplicate in all transponders:");
 
 		/* read channels that belong to the current transponder */
 		ParseChannels(node->xmlChildrenNode, transport_stream_id, original_network_id, satellitePosition, freq, polarization);
@@ -336,6 +336,7 @@ void CServiceManager::ParseTransponders(xmlNodePtr node, t_satellite_position sa
 		/* hop to next transponder */
 		node = node->xmlNextNode;
 	}
+	UpdateSatTransponders(satellitePosition);
 	return;
 }
 
@@ -1064,3 +1065,20 @@ bool CServiceManager::GetTransponder(transponder &t)
 	}
 	return false;
 }
+
+void CServiceManager::UpdateSatTransponders(t_satellite_position satellitePosition)
+{
+	pair<map<transponder_id_t, transponder>::iterator,bool> ret;
+	transponder_list_t & stransponders = satelliteTransponders[satellitePosition];
+	for (transponder_list_t::iterator tI = transponders.begin(); tI != transponders.end(); tI++) {
+		for (stiterator stI = stransponders.begin(); stI != stransponders.end(); ++stI) {
+			if (stI->second.compare(tI->second)) {
+				stransponders.erase(stI);
+				break;
+			}
+		}
+		ret = stransponders.insert(transponder_pair_t(tI->first, tI->second));
+		if (ret.second == false)
+			tI->second.dump("[zapit] duplicate in sat transponders:");
+	}
+}