diff --git a/src/Airports/airport.cxx b/src/Airports/airport.cxx
index 89a98202e..201fc28d4 100644
--- a/src/Airports/airport.cxx
+++ b/src/Airports/airport.cxx
@@ -76,6 +76,7 @@ FGAirport::FGAirport( PositionedID aGuid,
     _dynamics(0),
     mTowerDataLoaded(false),
     mRunwaysLoaded(false),
+    mHelipadsLoaded(false),
     mTaxiwaysLoaded(false),
     mProceduresLoaded(false),
     mILSDataLoaded(false)
diff --git a/src/GUI/MapWidget.cxx b/src/GUI/MapWidget.cxx
index 4f1d952c0..80158939f 100644
--- a/src/GUI/MapWidget.cxx
+++ b/src/GUI/MapWidget.cxx
@@ -388,6 +388,7 @@ MapWidget::MapWidget(int x, int y, int maxX, int maxY) :
   _height = maxY - y;
   _hasPanned = false;
   _orthoAzimuthProject = false;
+  _magneticHeadings = false;
   
   MapData::setFont(legendFont);
   MapData::setPalette(colour);