diff --git a/src/blackmisc/aviation/aircraftsituationchange.cpp b/src/blackmisc/aviation/aircraftsituationchange.cpp
index f0852e3e9..296937a2e 100644
--- a/src/blackmisc/aviation/aircraftsituationchange.cpp
+++ b/src/blackmisc/aviation/aircraftsituationchange.cpp
@@ -107,7 +107,7 @@ namespace BlackMisc
 
         QString CAircraftSituationChange::convertToQString(bool i18n) const
         {
-            Q_UNUSED(i18n);
+            Q_UNUSED(i18n)
             static const QString null("null");
             if (this->isNull()) { return null; }
             return u"CS: '" % this->getCallsign().asString() %
diff --git a/src/xswiftbus/traffic.cpp b/src/xswiftbus/traffic.cpp
index eef97b22a..b548e1ff0 100644
--- a/src/xswiftbus/traffic.cpp
+++ b/src/xswiftbus/traffic.cpp
@@ -512,6 +512,7 @@ namespace XSwiftBus
             double groundElevation = 0.0;
             if (getSettings().isTerrainProbeEnabled())
             {
+                // we expect elevation in meters
                 groundElevation = plane->terrainProbe.getElevation(latDeg, lonDeg, plane->position.elevation, requestedCallsign).front();
                 if (std::isnan(groundElevation)) { groundElevation = 0.0; }
             }