diff --git a/src/blackcore/airspace_monitor.cpp b/src/blackcore/airspace_monitor.cpp
index 3b9edffd8..25815f2e9 100644
--- a/src/blackcore/airspace_monitor.cpp
+++ b/src/blackcore/airspace_monitor.cpp
@@ -675,7 +675,6 @@ namespace BlackCore
     void CAirspaceMonitor::ps_atcPositionUpdate(const CCallsign &callsign, const BlackMisc::PhysicalQuantities::CFrequency &frequency, const CCoordinateGeodetic &position, const BlackMisc::PhysicalQuantities::CLength &range)
     {
         Q_ASSERT(BlackCore::isCurrentThreadObjectThread(this));
-        Q_ASSERT(CComSystem::isValidCivilAviationFrequency(frequency));
         if (!this->m_connected) { return; }
         CAtcStationList stationsWithCallsign = this->m_atcStationsOnline.findByCallsign(callsign);
         if (stationsWithCallsign.isEmpty())