diff --git a/src/OpenMesh/Apps/Decimating/DecimaterViewerWidget.hh b/src/OpenMesh/Apps/Decimating/DecimaterViewerWidget.hh
index 29dc1ff3..463da138 100644
--- a/src/OpenMesh/Apps/Decimating/DecimaterViewerWidget.hh
+++ b/src/OpenMesh/Apps/Decimating/DecimaterViewerWidget.hh
@@ -120,6 +120,13 @@ public:
     connect( timer_, SIGNAL(timeout()), SLOT(animate()) );
   }
   
+  DecimaterViewerWidget() :
+          animate_(false),
+          timer_(0),
+          steps_(0)
+  {
+  }
+
   /// destructor
   ~DecimaterViewerWidget()
   {