diff --git a/src/blackgui/settings/textmessagesettings.cpp b/src/blackgui/settings/textmessagesettings.cpp
index d64b89f91..e9a666163 100644
--- a/src/blackgui/settings/textmessagesettings.cpp
+++ b/src/blackgui/settings/textmessagesettings.cpp
@@ -66,7 +66,7 @@ namespace BlackGui::Settings
         if (textMessage.isRadioMessage())
         {
             if (!this->popupFrequencyMessages()) { return false; }
-            if (ownAircraft.isActiveFrequencyWithinChannelSpacing(textMessage.getFrequency())) { return true; }
+            if (ownAircraft.hasComActiveFrequency(textMessage.getFrequency())) { return true; }
         }
         return false;
     }
diff --git a/src/blackmisc/simulation/simulatedaircraft.cpp b/src/blackmisc/simulation/simulatedaircraft.cpp
index 0dfc26a26..1b62677b8 100644
--- a/src/blackmisc/simulation/simulatedaircraft.cpp
+++ b/src/blackmisc/simulation/simulatedaircraft.cpp
@@ -563,7 +563,7 @@ namespace BlackMisc::Simulation
         m_pilot.setCallsign(callsign);
     }
 
-    bool CSimulatedAircraft::isActiveFrequencyWithinChannelSpacing(const CFrequency &comFrequency) const
+    bool CSimulatedAircraft::hasComActiveFrequency(const CFrequency &comFrequency) const
     {
         return m_com1system.isActiveFrequencySameFrequency(comFrequency) ||
                 m_com2system.isActiveFrequencySameFrequency(comFrequency);
diff --git a/src/blackmisc/simulation/simulatedaircraft.h b/src/blackmisc/simulation/simulatedaircraft.h
index 0ed3dbd04..dae4595e4 100644
--- a/src/blackmisc/simulation/simulatedaircraft.h
+++ b/src/blackmisc/simulation/simulatedaircraft.h
@@ -290,8 +290,8 @@ namespace BlackMisc
             //! Identical COM system?
             bool hasSameComData(const Aviation::CComSystem &com1, const Aviation::CComSystem &com2, const Aviation::CTransponder &transponder);
 
-            //! Is any (COM1/2) active frequency within the COM units channel spacing?
-            bool isActiveFrequencyWithinChannelSpacing(const PhysicalQuantities::CFrequency &comFrequency) const;
+            //! Is comFrequency selected in COM1 or COM2 as active frequency (with 5 kHz spacing for .x20/.x25 and .x70/.x75)
+            bool hasComActiveFrequency(const PhysicalQuantities::CFrequency &comFrequency) const;
 
             //! Get transponder
             const Aviation::CTransponder &getTransponder() const { return m_transponder; }